diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/01.reflection-refraction-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/02.reflection-refraction-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/03.reflection-refraction-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.en.md
deleted file mode 100644
index 202738a45..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.en.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/04.reflection-refraction-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/05.reflection-refraction-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.en.md
deleted file mode 100644
index 4ec1c0df0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new course'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.es.md
deleted file mode 100644
index 5dbd420da..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo curso'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.fr.md
deleted file mode 100644
index 3316aa22f..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/01.reflection-refraction/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau cours'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/01.absorption-transmission-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/02.absorption-transmission-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/03.absorption-transmission-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.en.md
deleted file mode 100644
index 202738a45..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.en.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/04.absorption-transmission-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/05.absorption-transmission-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.en.md
deleted file mode 100644
index 32aaccd77..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new course 2'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.es.md
deleted file mode 100644
index 5dbd420da..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo curso'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.fr.md
deleted file mode 100644
index 3316aa22f..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/02.absorption-transmission/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau cours'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.en.md
deleted file mode 100644
index d071d5f52..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'The luminous phenomena'
-slug: optical-phenomona
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.es.md
deleted file mode 100644
index d071d5f52..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'The luminous phenomena'
-slug: optical-phenomona
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.fr.md
deleted file mode 100644
index d1d8c0d45..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/02.optical-phenomena/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Les phénomènes lumineux'
-slug: optical-phenomona
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/01.new-course-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/02.new-course-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/03.new-course-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.en.md
deleted file mode 100644
index c5ea2af52..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.en.md
+++ /dev/null
@@ -1,52 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
-
-Ya es possible hacer
-I can here :
-- write a full "parallel 1 course" if required
-- or add add a few word about a "course parallel 1" that is written somewhere in "pages/curriculum/..."
-- or do nothing.
-
-    Go 
-    
-    [there](http://localhost:8000/en/m3p2-curriculum/physics-chemistry-biology/niv3/Geometrical-optics/geometrical-optics-general/geometrical-optics-validity/geometrical-optics-domain-of-validity-overview)
-    
-    [Current chapter](.)
-    [Parent chapter](..)
-    [Sibling chapter](../another-chapter)
-    [Child chapter](chapter)
-    [Anchor in the page](#slug-of-header)
-
-<details markdown=1>
-<summary>
-TOWARDS parallel 1, if their are several
-</summary>
-This is a text
-```math
-f\colon\left\{\begin{aligned}\mathbb{R}_4[X]&\longrightarrow\mathbb{R}_4[X] \\
-P&\longmapsto P’\end{aligned}\right.
-\qquad
-g\colon\left\{\begin{aligned}\mathbb{R}_2[X]&\longrightarrow\mathbb{R}_2[X] \\
-P&\longmapsto XP’+P\end{aligned}\right.
-```
-</details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/04.new-course-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/05.new-course-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.en.md
deleted file mode 100644
index 4ec1c0df0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new course'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.es.md
deleted file mode 100644
index 5dbd420da..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo curso'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.fr.md
deleted file mode 100644
index 3316aa22f..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/01.new-course/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau cours'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/01.new-course-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/02.new-course-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/03.new-course-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.en.md
deleted file mode 100644
index 202738a45..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.en.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/04.new-course-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/05.new-course-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.en.md
deleted file mode 100644
index 32aaccd77..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new course 2'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.es.md
deleted file mode 100644
index 5dbd420da..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo curso'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.fr.md
deleted file mode 100644
index 3316aa22f..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/02.new-course-2/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau cours'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/01.new-course-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/02.new-course-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/03.new-course-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.en.md
deleted file mode 100644
index 202738a45..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.en.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/04.new-course-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/05.new-course-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.en.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.es.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.fr.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.en.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.es.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.fr.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.en.md
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new course 3'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.es.md
deleted file mode 100644
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo curso'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.fr.md
deleted file mode 100644
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/03.new-course-3/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau cours'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.en.md
deleted file mode 100644
index 598cbc21b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'new chapter 1'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.es.md
deleted file mode 100644
index 2ed9ca58a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.es.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nuevo capitulo'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.fr.md
deleted file mode 100644
index 5ca031d6d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/01.object-image/topic.fr.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'nouveau chapitre'
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.en.md
deleted file mode 100644
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--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.en.md
+++ /dev/null
@@ -1,69 +0,0 @@
----
-title: 'Spherical refracting surface in paraxial approximation'
----
-
-### Spherical refracting surface in paraxial approximation.
-
-#### Refracting surface. 
-
-A **refracting surface** is a *polished surface between two media with different refractive indexes*.
-
-!!!! *BE CAREFUL* :<br>
-!!!! In the same way as we use in English the single word "mirror" to qualify a "reflecting surface", in French is use the single word "dioptre" to qualify a "refracting surface".
-!!!! The term "dioptre" in English is a unit of mesure of the vergence of an optical system. In French, the same unit of mesaure is named "dioptrie".
-!!!! So keep in mind the following scheme :
-!!!!
-!!!! refracting surface : *EN : refracting surface* , *ES : superficie refractiva* , *FR : dioptre*.<br>
-!!!! _A crystal ball forms a spherical refracting surface : un "dioptre sphérique" in French._
-!!!!
-!!!! unit of measure : *EN : dioptre* , *ES : dioptría* , *FR : dioptrie*.<br>
-!!!! _My corrective lens for both eyes are 4 dioptres : "4 dioptries" in French._
-
-
-#### Spherical refracting surface.
-
-
-
-#### Analytical study of the position and shape of an image.
-
-A **spherical refracting surface** in analytical paraxial optics is defined by *three quantities* :
-* **$`n_{ini}`$** : *refractive index of the initial medium* (the medium on the side on the incident light).
-* **$`n_{fin}`$** : *refractive index of the final medium* (the medium on the side on the emerging light, after crossing the refracting surface).
-* **$`\overline{SC}`$** : the *algebraic distance between the __vertex S__* (sometimes called "pole", is the centre of the aperture) *and the __center of curvature C__* of the refracting surface.
-
-! *USEFUL* : The whole analytic study below also applies to a plane refracting surface. We just need to remark that a plane surface is a spherical surface whose radius of curvature tends towards infinity.
-
-<!--à finir !!!! BE CAREFUL : For a same physical situations, a spherical surface between two transparent media, for optics, ... -->
-
-Consider a *point object* **$`B_{obj}`$** whose orthogonal projection on the optical axis gives the *point object*  **$`A_{obj}`$**. If the point object is located on the optical axis, then $`B_{obj}=A_{obj}`$ and we will use to named it point object $`A_{obj}`$. The point object $`B_{obj}`$ can be **real** *as well as* **virtual**.
-
-The **calculation of the position** of the *point image* **$`B_{ima}`$**, *conjugated point of the point object $`B_{obj}`$* by the refracting surface, is carried out in **two steps** :
-
-1.  I use the **spherical refracting surface equation** (known too as the **"conjuction equation" for a spherical refracting surface**) to calculate the *position of the point* **$`A_{ima}`$**, $`A_{ima}`$ being the *orthogonal projection on the optical axis of the point image* $`B_{ima}`$. 
-
-**$`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=\dfrac{n_{fin}-n_{ini}}{\overline{SC}}`$**
-
-To perform this I *need to know the __algebraic distance__* **$`\overline{SA_{obj}}`$**, and the *calculation  of the __algebraic distance__* **$`\overline{SA_{ima}}`$** along the optical axis *gives me the position of $`A_{ima}`$*.
-<!--conjugación-->
-
-2. I use the **"transverse magnification equation" for a spherical refracting surface**, to calculate the *__algebraic value__ of the transverse magnification* **$`\overline{M_T}`$**, then to derive the *__algebraic length__* **$`\overline{A_{ima}B_{ima}}`$** of the segment $`[A_{ima}B_{ima}]`$, that is the algebraic distance of the point image $`B_{ima}`$ from its orthogonal projection $`A_{ima}`$ on the optical axis.
-
-By *definition :* **$`\overline{M_T}=\dfrac{\overline{A_{ima}B_{ima}}}{\overline{A_{obj}B_{obj}}}`$**.
-Its *expression for spherical refracting surface :* **$`\overline{M_T}=\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$**.
-
-I know $`\overline{SA_{obj}}$, $n_{ini}$ and $n_{fin}$, I have previously calculated $`\overline{SA_{ima}}$, so I can calculate $`\overline{M_T}`$ and deduced $`\overline{A_{ima}B_{ima}}`$
-
-
-! *USEFUL* : The conjuction equation and the transverse magnification equation for a plane refracting surface are obtained by rewriting these equations for a spherical refracting surface in the limit when $`|\overline{SC}|\longrightarrow\infty`$.<br> Then we get *for a plane refracting surface :*
-!
-! * *conjuction equation :*&nbsp;&nbsp; $`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=0`$.
-!
-! * *transverse magnification equation :*&nbsp;&nbsp; $`\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$ &nbsp;&nbsp; (unchanged).
-!
-! This generalizes and completes the knowledge you get about plane refracting surfaces seen in your pedagogical paths in plain and hills.
-
-
-#### Graphical study of the position and shape of an image.
-
-
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.es.md
deleted file mode 100644
index be5fe9072..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.es.md
+++ /dev/null
@@ -1,64 +0,0 @@
----
-title: 'Superficie refractaria esférica en aproximación paraxial.'
----
-
-### Superficie refractaria esférica en aproximación paraxial.
-
-#### Superficie refractiva
-
-Una **superficie refractiva** es una *superficie pulida entre dos medios con diferentes índices de refracción*.
-
-!!!! *ATENCIÓN* : <br>
-!!!! De la misma manera que usamos en español la palabra "espejo" para calificar una "superficie reflectante", en francés se usa la palabra "dioptre" para calificar una "superficie refractante".
-!!!! El término "dioptre" en inglés es la unidad de medida "dioptría" de la vergencia de un sistema óptico. En francés, la misma unidad de mesa se llama "dioptrie".
-!!!! Así que ten en cuenta el siguiente esquema:
-!!!!
-!!!! superficie refractiva: *ES : superficie refractiva* , *FR : dioptre* , *EN : refracting surface*.<br>
-!!!! _Una bola de cristal forma una superficie refractiva esférica: un "dioptre sphérique" en francés._
-!!!!
-!!!! unidad de medida: *ES: dioptría* , *FR: dioptrie* , *EN: dioptre*.<br>
-!!!! _Mis lentes correctoras para ambos ojos son 4 dioptrías: "4 dioptries" en francés, y "4 dioptres" en inglés._
-
-#### Superficie refractiva esférica.
-
-#### Estudio analítico de la posición y forma de una imagen.
-
-Una **superficie refractiva esférica** en óptica analítica paraxial se caracteriza por "tres cantidades físicas" :
-* **$`n_{ini}`$** : *índice de refracción del medio inicial* (centro ubicado en el lado de la luz incidente).
-* **$`n_{fin}`$** : *índice de refracción del medio final * (medio ubicado en el lado de la luz emergente, después de la refracción por la superficie refractiva).
-* **$`\overline{SC}`$** : *distancia algebraica entre el __vértice S__* (punto de intersección de la superficie refractiva con su eje óptico, su eje de revolución.)* y el *_centro de curvatura_ C* de la superficie refractiva esférica.
-
-! *IMPORTANTE*: El estudio analítico a continuación también se aplica para una superficie refractiva plana. Basta con señalar que una superficie refractiva plana es una superficie refractiva esférica cuyo radio de curvatura tiende hacia el infinito.
-
-Considera un *punto objeto* **$`B_{obj}`$** cuya proyección ortogonal en el eje óptico da el  *punto objeto* **$`A_{obj}`$**. Si el punto del objeto está ubicado en el eje óptico, entonces $`B_{obj}=A_{obj}`$ y lo llamaremos punto objeto $`A_{obj}`$. El punto objeto $`B_{obj}`$ puede ser ambos **real** *y* **virtual**.
-
-Le **calcul de la position** du *point image* **$`B_{ima}`$**, *point conjugué du point objet $`B_{obj}`$* par le dioptre, s'effectue en **deux étapes** :
-
-1.  J'utilise la **relation de conjugaison du dioptre sphérique** pour calculer la *position du point* **$`A_{ima}`$**, $`A_{ima}`$ étant la *projection orthogonale sur l'axe optique du point image* $`B_{ima}`$. 
-
-**$`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=\dfrac{n_{fin}-n_{ini}}{\overline{SC}}`$**
-
-Pour réaliser ceci *je dois connaître la __distance algébrique__* **$`\overline{SA_{obj}}`$**, et le *calcul de la __distance algébrique__* **$`\overline{SA_{ima}}`$** le long de l'axe optique *me donne la position du point $`A_{ima}`$*.
-<!--conjugación-->
-
-2. J'utilise la **formule du "grandissement transversal" pour un dioptre sphérique** pour calculer la *__valeur algébrique__ du grandissement transversale* **$`\overline{M_T}`$** *du sègment $`[A_{obj}B_{obj}]`$, puis j'en déduis la *__longueur algébrique__* **$`\overline{A_{ima}B_{ima}}`$** du sègmentt $`[A_{ima}B_{ima}]`$, c'est à dire la distance entre le point image $`B_{ima}`$ et sa projection orthogonale sur l'axe optique $`A_{ima}`$.
-
-Par *definition :* **$`\overline{M_T}=\dfrac{\overline{A_{ima}B_{ima}}}{\overline{A_{obj}B_{obj}}}`$**.
-Son *expression pour un dioptre sphérique* est : **$`\overline{M_T}=\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$**.
-
-Je connais $`\overline{SA_{obj}}$, $n_{ini}$ and $n_{fin}$, j'ai précédemment calculé $`\overline{SA_{ima}}$, alors je peux déterminer $`\overline{M_T}`$ et en déduire $`\overline{A_{ima}B_{ima}}`$
-
-
-! *IMPORTANT* : La relation de conjugaison et la formule du grandissement transversal pour un dioptre plan s'obtiennent facilement en réécrivant la relation de conjugaison et la formule du grandissement transversal pour un dioptre pour un dioptre sphérique dans la limite d'un rayon de courbure qui tend vers l'infini :  $`|\overline{SC}|\longrightarrow\infty`$.<br> Cela donne *pour un dioptre plan :*
-!
-! * *relation de conjugaison :*&nbsp;&nbsp; $`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=0`$.
-!
-! * *formule du grandissement transversal :*&nbsp;&nbsp; $`\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$ &nbsp;&nbsp; (unchanged).
-!
-! Ceci généralise et complète votre maîtrise du dioptre plan par rapport à ce que vous avez vu dans votre parcours pédagogiques en plaine et collines sur les dioptres plan.
-
-
-#### Etude graphique de la position et de la forme d'une image.
-
-
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/01.spherical-refracting-surface-main/textbook.fr.md
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+++ /dev/null
@@ -1,84 +0,0 @@
----
-title: 'Le dioptre sphérique en approximation paraxiale'
----
-
-### Surface réfractante et dioptre
-
-Une **surface réfractante** est une *surface séparant deux milieux transparents, homogènes et isotropes différents*, caratérisés par deux indices de réfraction de valeurs différentes.
-
-Les surfaces réfratantes les plus rencontrées sont les surfaces réfractantes planes et sphériques.
-
-#### Surface plane réfractante et dioptre plan 
-
-Considérons une **surface réfractante plane**. Comme les *milieux sont différents de part et d'autre* de la surface réfractante, **le plan de la surface n'est pas un plan de symétrie**. Optiquement, cela se traduit par le fait qu'un même objet situé à une même distance du dioptre ne donnera pas la même image selon qu'il est situé dans le milieu d'indice de réfraction fort ou faible. Les images obtenues de ce même objet ne se situeront pas à la même distance du dioptre ni n'auront la même taille. 
-
-*Selon le sens de propagation de la lumière* (du milieu d'indice $n_a$ vers le milieu d'indice $n_B$, ou l'inverse), une surface réfractante définira **deux comportements optiques différents**. 
-
-
-! Quand je ragarde une surface réfractante, je peux dire "je vois un dioptre", parce que l'action de regarder une surface réfractante impose un sens de propagation de la lumière, le milieu final d'indice de réfraction $n_{fin}$ étant celui dans lequel je me situe, le plus souvent l'air. Mais en tant qu'acteur de la science et la technologie, concevant des systèmes optiques comprenant des surfaces réfractantes entre des milieux où je ne me situe pas, je dois considérer qu'une surface réfractante définit deux dioptres :
-!
-! &nbsp;&nbsp;&nbsp;*1 surface réfractante = 2 dioptres*
-
-
-
-
-
-Dioptre sphérique, en approximation paraxiale.
-
-#### Dioptre.
-
-Un **dioptre** est une *surface polie séparant deux milieux d'indice de réfraction différents*.
-
-!!!! *ATTENTION* :<br>
-!!!! Si il existe en espagnol et en anglais respectivement les simples mots "espejo" et "mirror" pour qualifier une surface réfléchissante, il n'existe pas dans ces deux langues un simple mot pour qualifier une surface réfractante ("dioptre" en français). Ainsi dans ces deux langues, un "dioptre" sera qualifié par sa simple description "surface réfractante", soient "superficie refractiva" en espagnol et "refracting surface" en anglais. En anglais, le terme "dioptre" existe, mais il désigne une unité de mesure de la vergence (du pouvoir réfractant), unité appelée "dioptrie" en français et "dioptría" en espagnol. Donc se souvenir du schéma suivant :
-!!!!
-!!!! surface réfractante : *FR : dioptre* , *ES : superficie refractiva* , *EN : refracting surface*.<br>
-!!!! _la surface d'une boule de cristal forme un dioptre sphérique : une "spherical refracting surface" et "superficie refractiva esférica" respectivement en espagnol et anglais._
-!!!!
-!!!! unité de mesure : *FR : dioptrie* , *ES : dioptría* , *EN : dioptre*.<br>
-!!!! _Les verres correcteurs de mes deux yeux ont une même puissance de 4 dioptries : "4 dioptries" et "4 dioptres" respectivement en espagnol et anglais._
-
-#### Dioptre sphérique.
-
-#### Etude analytique de la position et de la forme d'une image.
-
-Un **dioptre sphérique** en optique anlytique paraxial est caractérisé par "trois grandeurs physiques" :
-* **$`n_{ini}`$** : *indice de réfraction du milieu initial* (milieu situé du côté de la lumière incidente).
-* **$`n_{fin}`$** : *indice de réfraction du milieu final* (milieu situé du côté de la lumière émergeante, après réfraction par le dioptre).
-* **$`\overline{SC}`$** : *distance algébrique entre le __sommet S__* (point d'intersection du dioptre avec l'axe optique, son axe de révolution) *et le __centre de courbure C__* de la surface sphérique du dioptre.
-
-! *IMPORTANT* : L'étude analytique ci-dessous s'applique aussi pour un dioptre pla,. Il sufit de remarquer qu'un dioptre plan est un dioptre sphérique dont le rayon de courbure tend vers l'infini.
-
-Soit un *point objet* **$`B_{obj}`$** dont la projection orthogonale sur l'axe optique donne le *point objet*  **$`A_{obj}`$**. Si le point objet est situé sur l'axe optique, alors $`B_{obj}=A_{obj}`$ et nous l'appellerons point objet $`A_{obj}`$. Le pint objet $`B_{obj}`$ peut aussi bien être **réel** *que* **virtuel**.
-
-Le **calcul de la position** du *point image* **$`B_{ima}`$**, *point conjugué du point objet $`B_{obj}`$* par le dioptre, s'effectue en **deux étapes** :
-
-1.  J'utilise la **relation de conjugaison du dioptre sphérique** pour calculer la *position du point* **$`A_{ima}`$**, $`A_{ima}`$ étant la *projection orthogonale sur l'axe optique du point image* $`B_{ima}`$. 
-
-**$`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=\dfrac{n_{fin}-n_{ini}}{\overline{SC}}`$**
-
-Pour réaliser ceci *je dois connaître la __distance algébrique__* **$`\overline{SA_{obj}}`$**, et le *calcul de la __distance algébrique__* **$`\overline{SA_{ima}}`$** le long de l'axe optique *me donne la position du point $`A_{ima}`$*.
-<!--conjugación-->
-
-2. J'utilise la **formule du "grandissement transversal" pour un dioptre sphérique** pour calculer la *__valeur algébrique__ du grandissement transversale* **$`\overline{M_T}`$** *du sègment $`[A_{obj}B_{obj}]`$, puis j'en déduis la *__longueur algébrique__* **$`\overline{A_{ima}B_{ima}}`$** du sègmentt $`[A_{ima}B_{ima}]`$, c'est à dire la distance entre le point image $`B_{ima}`$ et sa projection orthogonale sur l'axe optique $`A_{ima}`$.
-
-Par *definition :* **$`\overline{M_T}=\dfrac{\overline{A_{ima}B_{ima}}}{\overline{A_{obj}B_{obj}}}`$**.
-Son *expression pour un dioptre sphérique* est : **$`\overline{M_T}=\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$**.
-
-Je connais $`\overline{SA_{obj}}$, $n_{ini}$ and $n_{fin}$, j'ai précédemment calculé $`\overline{SA_{ima}}$, alors je peux déterminer $`\overline{M_T}`$ et en déduire $`\overline{A_{ima}B_{ima}}`$
-
-
-! *IMPORTANT* : La relation de conjugaison et la formule du grandissement transversal pour un dioptre plan s'obtiennent facilement en réécrivant la relation de conjugaison et la formule du grandissement transversal pour un dioptre pour un dioptre sphérique dans la limite d'un rayon de courbure qui tend vers l'infini :  $`|\overline{SC}|\longrightarrow\infty`$.<br> Cela donne *pour un dioptre plan :*
-!
-! * *relation de conjugaison :*&nbsp;&nbsp; $`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=0`$.
-!
-! * *formule du grandissement transversal :*&nbsp;&nbsp; $`\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$ &nbsp;&nbsp; (unchanged).
-!
-! Ceci généralise et complète votre maîtrise du dioptre plan par rapport à ce que vous avez vu dans votre parcours pédagogiques en plaine et collines sur les dioptres plan.
-
-
-#### Etude graphique de la position et de la forme d'une image.
-
-
-
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/02.spherical-refracting-surface-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/02.spherical-refracting-surface-overview/cheatsheet.en.md
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+++ /dev/null
@@ -1,76 +0,0 @@
----
-title: 'Spherical refracting surface  : overview'
-media_order: dioptre-1.gif
----
-
-### Spherical refracting surface modeling.
-
-#### Description 
-
-![](dioptre-1.gif)
-
-with :
-* arrow : indicates direction of light propagation.
-* $`n_{ini}`$ : refractive index of the initial medium.
-* $`n_{fin}`$ : refractive index of the final medium.
-* $`\overline{SC}`$ : algebraic distance between vertex S and center C of curvature on optical axis.
-
-
-
-
-
-
-
-
-!!!! *BE CAREFUL* :<br>
-!!!! In the same way as we use in English the single word "mirror" to qualify a "reflecting surface", in French is use the single word "dioptre" to qualify a "refracting surface".
-!!!! The term "dioptre" in English is a unit of mesure of the vergence of an optical system. In French, the same unit of mesaure is named "dioptrie".
-!!!! So keep in mind the following scheme :
-!!!!
-!!!! refracting surface : *EN : refracting surface* , *ES : superficie refractiva* , *FR : dioptre*.<br>
-!!!! _A crystal ball forms a spherical refracting surface : un "dioptre sphérique" in French._
-!!!!
-!!!! unit of measure : *EN : dioptre* , *ES : dioptría* , *FR : dioptrie*.<br>
-!!!! _My corrective lens for both eyes are 4 dioptres : "4 dioptries" in French._
-
-
-#### Spherical refracting surface.
-
-#### Analytical study of the position and shape of an image.
-
-A **spherical refracting surface** in analytical paraxial optics is defined by *three quantities* :
-* **$`n_{ini}`$** : *refractive index of the initial medium* (the medium on the side on the incident light).
-* **$`n_{fin}`$** : *refractive index of the final medium* (the medium on the side on the emerging light, after crossing the refracting surface).
-* **$`\overline{SC}`$** : the *algebraic distance between the __vertex S__* (sometimes called "pole", is the centre of the aperture) *and the __center of curvature C__* of the refracting surface.
-
-! *USEFUL* : The whole analytic study below also applies to a plane refracting surface. We just need to remark that a plane surface is a spherical surface whose radius of curvature tends towards infinity.
-
-Consider a *point object* **$`B_{obj}`$** whose orthogonal projection on the optical axis gives the *point object*  **$`A_{obj}`$**. If the point object is located on the optical axis, then $`B_{obj}=A_{obj}`$ and we will use to named it point object $`A_{obj}`$. The point object $`B_{obj}`$ can be **real** *as well as* **virtual**.
-
-The **calculation of the position** of the *point image* **$`B_{ima}`$**, *conjugated point of the point object $`B_{obj}`$* by the refracting surface, is carried out in **two steps** :
-
-1.  I use the **spherical refracting surface equation** (known too as the **"conjuction equation" for a spherical refracting surface**) to calculate the *position of the point* **$`A_{ima}`$**, $`A_{ima}`$ being the *orthogonal projection on the optical axis of the point image* $`B_{ima}`$. 
-
-**$`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=\dfrac{n_{fin}-n_{ini}}{\overline{SC}}`$**
-
-To perform this I *need to know the __algebraic distance__* **$`\overline{SA_{obj}}`$**, and the *calculation  of the __algebraic distance__* **$`\overline{SA_{ima}}`$** along the optical axis *gives me the position of $`A_{ima}`$*.
-<!--conjugación-->
-
-2. I use the **"transverse magnification equation" for a spherical refracting surface**, to calculate the *__algebraic value__ of the transverse magnification* **$`\overline{M_T}`$**, then to derive the *__algebraic length__* **$`\overline{A_{ima}B_{ima}}`$** of the segment $`[A_{ima}B_{ima}]`$, that is the algebraic distance of the point image $`B_{ima}`$ from its orthogonal projection $`A_{ima}`$ on the optical axis.
-
-By *definition :* **$`\overline{M_T}=\dfrac{\overline{A_{ima}B_{ima}}}{\overline{A_{obj}B_{obj}}}`$**.
-Its *expression for spherical refracting surface :* **$`\overline{M_T}=\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$**.
-
-I know $`\overline{SA_{obj}}$, $n_{ini}$ and $n_{fin}$, I have previously calculated $`\overline{SA_{ima}}$, so I can calculate $`\overline{M_T}`$ and deduced $`\overline{A_{ima}B_{ima}}`$
-
-
-! *USEFUL* : The conjuction equation and the transverse magnification equation for a plane refracting surface are obtained by rewriting these equations for a spherical refracting surface in the limit when $`|\overline{SC}|\longrightarrow\infty`$.<br> Then we get *for a plane refracting surface :*
-!
-! * *conjuction equation :*&nbsp;&nbsp; $`\dfrac{n_{fin}}{\overline{SA_{ima}}}-\dfrac{n_{ini}}{\overline{SA_{obj}}}=0`$.
-!
-! * *transverse magnification equation :*&nbsp;&nbsp; $`\dfrac{n_{ini}\cdot\overline{SA_{ima}}}{n_{fin}\cdot\overline{SA_{obj}}}`$ &nbsp;&nbsp; (unchanged).
-!
-! This generalizes and completes the knowledge you get about plane refracting surfaces seen in your pedagogical paths in plain and hills.
-
-
-#### Graphical study of the position and shape of an image.
\ No newline at end of file
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----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
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----
-title: 'Le dioptre sphérique, en approximation paraxiale : synthèse'
-media_order: 'dioptre1ok.png,dioptre2ok.png,dioptre3ok.png,dioptre4ok.png'
----
-
-Le dioptre sphérique, en approximation paraxiale
-
-![](dioptre4ok.png)
-
-![](dioptre3ok.png)
-
-![](dioptre2ok.png)
-
-![](dioptre1ok.png)
\ No newline at end of file
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+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
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+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/03.spherical-refracting-surface-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/03.spherical-refracting-surface-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/03.spherical-refracting-surface-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.en.md
deleted file mode 100644
index 38ec7b17f..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.en.md
+++ /dev/null
@@ -1,52 +0,0 @@
----
-title: 'Spherical mirror (parallel 1)'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
-
-Ya es possible hacer
-I can here :
-- write a full "parallel 1 course" if required
-- or add add a few word about a "course parallel 1" that is written somewhere in "pages/curriculum/..."
-- or do nothing.
-
-    Go 
-    
-    [there](http://localhost:8000/en/m3p2-curriculum/physics-chemistry-biology/niv3/Geometrical-optics/geometrical-optics-general/geometrical-optics-validity/geometrical-optics-domain-of-validity-overview)
-    
-    [Current chapter](.)
-    [Parent chapter](..)
-    [Sibling chapter](../another-chapter)
-    [Child chapter](chapter)
-    [Anchor in the page](#slug-of-header)
-
-<details markdown=1>
-<summary>
-TOWARDS parallel 1, if their are several
-</summary>
-This is a text
-```math
-f\colon\left\{\begin{aligned}\mathbb{R}_4[X]&\longrightarrow\mathbb{R}_4[X] \\
-P&\longmapsto P’\end{aligned}\right.
-\qquad
-g\colon\left\{\begin{aligned}\mathbb{R}_2[X]&\longrightarrow\mathbb{R}_2[X] \\
-P&\longmapsto XP’+P\end{aligned}\right.
-```
-</details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/04.spherical-refracting-surface-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.en.md
deleted file mode 100644
index 692bdb96d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'Thin lens (parallel 2)'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/05.spherical-refracting-surface-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.en.md
deleted file mode 100644
index 5785895d1..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'Plane refracting surface (previous level)'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/06.spherical-refracting-surface-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.en.md
deleted file mode 100644
index f4c5db0b0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'Refraction matrix (next level)'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/07.spherical-refracting-surface-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.en.md
deleted file mode 100644
index 1d67d8809..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Spherical refracting surface '
----
-
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.es.md
deleted file mode 100644
index 6cdb9c256..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.es.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: 'Le dioptre '
----
-
-Dioptre sphérique,
-Dioptre plan
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.fr.md
deleted file mode 100644
index 6cdb9c256..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/02.plane-refracting-surface/topic.fr.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: 'Le dioptre '
----
-
-Dioptre sphérique,
-Dioptre plan
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.fr.md
deleted file mode 100644
index 75f528d53..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/01.lens-main/textbook.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
-
-#### Classification des lentilles
-
-A simple lens is a volume made with a transparent substance of refractive index $n$, that present a symetry of revolution around an axis called the optical axis of the lens. This volume is bound by two polished surfaces that can be both curved, or one curved and the other plane. The curved surfaces which have to 
-
-We limit 
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/2-centered-refracting-surfaces-1-all.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/2-centered-refracting-surfaces-1-all.gif
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/2-centered-refracting-surfaces-direction-axis.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/2-centered-refracting-surfaces-direction-axis.gif
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Const_lens_conv_point_AapresO.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Const_lens_conv_point_AapresO.gif
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Const_lens_conv_point_AavantF2.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Const_lens_conv_point_AavantF2.gif
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Lentille_epaisse_Gauss_incl_v1.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Lentille_epaisse_Gauss_incl_v1.gif
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Lentille_epaisse_principe_ok.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/Lentille_epaisse_principe_ok.gif
deleted file mode 100644
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diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.fr.md
deleted file mode 100644
index 685732d95..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,20 +0,0 @@
----
-title: 'nouveau cours : synthèse'
-media_order: '2-centered-refracting-surfaces-direction-axis.gif,2-centered-refracting-surfaces-1-all.gif,lentille_relle_representation_v1.gif,Const_lens_conv_point_AapresO.gif,Const_lens_conv_point_AavantF2.gif,Lentille_epaisse_principe_ok.gif,Lentille_epaisse_Gauss_incl_v1.gif'
----
-
-nouveau cours : synthèse
-
-![](Const_lens_conv_point_AapresO.gif)
-
-![](Const_lens_conv_point_AavantF2.gif)
-
-![](Lentille_epaisse_Gauss_incl_v1.gif)
-
-![](lentille_relle_representation_v1.gif)
-
-![](Lentille_epaisse_Gauss_incl_v1.gif)
-
-![](2-centered-refracting-surfaces-1-all.gif)
-
-![](2-centered-refracting-surfaces-direction-axis.gif)
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/lentille_relle_representation_v1.gif b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/lentille_relle_representation_v1.gif
deleted file mode 100644
index 28f1900ff..000000000
Binary files a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/02.lens-overview/lentille_relle_representation_v1.gif and /dev/null differ
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/03.lens-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.en.md
deleted file mode 100644
index c5ea2af52..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.en.md
+++ /dev/null
@@ -1,52 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
-
-Ya es possible hacer
-I can here :
-- write a full "parallel 1 course" if required
-- or add add a few word about a "course parallel 1" that is written somewhere in "pages/curriculum/..."
-- or do nothing.
-
-    Go 
-    
-    [there](http://localhost:8000/en/m3p2-curriculum/physics-chemistry-biology/niv3/Geometrical-optics/geometrical-optics-general/geometrical-optics-validity/geometrical-optics-domain-of-validity-overview)
-    
-    [Current chapter](.)
-    [Parent chapter](..)
-    [Sibling chapter](../another-chapter)
-    [Child chapter](chapter)
-    [Anchor in the page](#slug-of-header)
-
-<details markdown=1>
-<summary>
-TOWARDS parallel 1, if their are several
-</summary>
-This is a text
-```math
-f\colon\left\{\begin{aligned}\mathbb{R}_4[X]&\longrightarrow\mathbb{R}_4[X] \\
-P&\longmapsto P’\end{aligned}\right.
-\qquad
-g\colon\left\{\begin{aligned}\mathbb{R}_2[X]&\longrightarrow\mathbb{R}_2[X] \\
-P&\longmapsto XP’+P\end{aligned}\right.
-```
-</details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/04.lens-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/05.lens-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/06.lens-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/07.lens-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.en.md
deleted file mode 100644
index 709b34149..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.en.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: Lens
----
-
-Lentille épaisse (d'épaisseur $e$ et d'indice de réfraction $n$) séparant deux milieux d'indices de réfraction différents $n_1$ et $n_2$,
-puis lorsque $n_1=n_2$ (lentille plongée dans un même milieu)
-puis approxiamtion lorsque $e$ tend vers 0 (lentille mince).
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.es.md
deleted file mode 100644
index aade3b839..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.es.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'La lentille '
----
-
-Lentille épaisse (d'épaisseur $e$ et d'indice de réfraction $n$) séparant deux milieux d'indices de réfraction différents $n_1$ et $n_2$,
-puis lorsque $n_1=n_2$ (lentille plongée dans un même milieu)
-puis approxiamtion lorsque $e$ tend vers 0 (lentille mince).
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.fr.md
deleted file mode 100644
index aade3b839..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/03.lens/topic.fr.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'La lentille '
----
-
-Lentille épaisse (d'épaisseur $e$ et d'indice de réfraction $n$) séparant deux milieux d'indices de réfraction différents $n_1$ et $n_2$,
-puis lorsque $n_1=n_2$ (lentille plongée dans un même milieu)
-puis approxiamtion lorsque $e$ tend vers 0 (lentille mince).
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.en.md
deleted file mode 100644
index 8b09b293d..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course : main'
----
-
-new course : main
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.es.md
deleted file mode 100644
index 1a131d64c..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso: principal'
----
-
-nuevo curso: principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.fr.md
deleted file mode 100644
index 305ebaeeb..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/01.new-course-main/textbook.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : principal'
----
-
-nouveau cours : principal
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.en.md
deleted file mode 100644
index 10d788880..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'new course  : overview'
----
-
-new course  : overview
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.es.md
deleted file mode 100644
index 2607ae8ee..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nuevo curso : síntesis'
----
-
-nuevo curso : síntesis
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.fr.md
deleted file mode 100644
index 2ed0a02ab..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/02.new-course-overview/cheatsheet.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'nouveau cours : synthèse'
----
-
-nouveau cours : synthèse
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.en.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'new course : beyond'
----
-
-! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions
-!
-! _Do not look at the answer, take time to think, a few days if necessary. The time to build your mental representation of the phenomenon, to formulate it in words is important, a thousand times more important than the ephemeral instant where you read the fews words of the solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "key word"
-! </summary>
-! diffusion
-! </details>
-! <details markdown=1>
-! <summary>
-! ANSWER
-! </summary>
-! diffusion
-! </details>
-
-
-!!!! *DIFFICULT POINT* (contribute, or indicate a difficult point of understanding)
-!!!!
-
-!! *BEYOND* (to contribute)
-!!
-
-!! *CULTURAL POINT* (contributor)
-!!
-
-!!! *DO  YOU  MASTER ?*
-!!! <details markdown=1>
-!!! <Summary>
-!!! Describe the test
-!!! </summary>
-!!! The text of the test (and its images, figures, audio, video, etc ...)
-!!!
-!!! Question text
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 1
-!!! </summary>
-!!! Text if this answer 1 is chosen
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Answer choice 2
-!!! </summary>
-!!! Text if this answer 2 is chosen
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Complete solution.
-!!! </summary>
-!!! text of the solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.es.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-title: 'nuevo curso: más allá'
----
-
-! *TU DESAFÍO*  :  Mire la imagen y encuentre las respuestas correctas a las siguientes preguntas.
-!
-! _No mire la respuesta, tómese el tiempo para pensar, unos días si es necesario. El momento de construir tu representación mental del fenómeno, de formular con palabras esta representación es importante, mil veces más importante que el momento efímero de leer las pocas palabras de la solución._
-!
-! <details markdown=1>
-! <summary>
-! ÍNDICE "palabra clave"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RESPUESTA
-! </summary>
-! xxx
-! </details>
-
-!!!! *PUNTO DIFÍCIL* (contribuya o indique los puntos difíciles que deben tomarse nuevamente)
-!!!!
-
-!! *MÁS ALLÁ* (contribuir)
-!!
-
-!! *ESCAPE CULTURAL* (contribuir)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Describe la prueba
-!!! </summary>
-!!! Texto de prueba (y sus imágenes, figuras, audio, video, etc ...)
-!!! ![una figura para la prueba] (nombre de archivo)
-!!!
-!!! Prueba la pregunta
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 1
-!!! </summary>
-!!! Texto si se elige la respuesta 1
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Respuesta opción 2
-!!! </summary>
-!!! Texto si se elige la respuesta 2
-!!! </details>
-!!! <!--Posibilidad de añadir respuestas, preguntas-->
-!!! <details markdown=1>
-!!! <summary>
-!!! Solucion completa
-!!! </summary>
-!!! Texto de la solución.
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/03.new-course-beyond/annex.fr.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-title: 'nouveau cours : au-delà'
----
-
-! *TON  DEFI*  :   
-!
-! _Ne regarde pas la réponse, prends le temps de réfléchir, quelques jours si nécessaire. Le temps de construire ta représentation mentale du phénomène, de formuler en mots cette réflexion est important, un millier de fois plus important que l'instant éphémère de la lecture des quelques mots de la solution._
-!
-! <details markdown=1>
-! <summary>
-! INDICE "mot clé"
-! </summary>
-! xxx
-! </details>
-! <details markdown=1>
-! <summary>
-! RÉPONSE
-! </summary>
-! xxx
-! </details>
-
-!!!! *POINT  DIFFICILE* (contribuer, ou indiquer les points difficiles qui méritent d'être repris)
-!!!!
-
-!! *AU-DELÀ* (contribuer)
-!!
-
-!! *ÉCHAPPÉE CULTURELLE* (contribuer)
-!!
-
-!!! *MAÎTRISES-TU ?*
-!!! <details markdown = 1>
-!!! <summary>
-!!! Descrire le test
-!!! </summary>
-!!! Texte du test (et ses images, figures, audio, video, etc ...)
-!!! ! [a figure for the test] (file-name)
-!!!
-!!! Texte de la question
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 1
-!!! </summary>
-!!! Texte si la réponse 1 est choisie
-!!! </details>
-!!! <details markdown=1>
-!!! <summary>
-!!! Choix de réponse 2
-!!! </summary>
-!!! Texte si la réponse 2 est choisie
-!!! </details>
-!!! <!--possibility to add answers, questions-->
-!!! -----
-!!! <details markdown=1>
-!!! <summary>
-!!! Solution complète
-!!! </summary>
-!!! Texte de la solution
-!!! </details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.en.md
deleted file mode 100644
index c5ea2af52..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.en.md
+++ /dev/null
@@ -1,52 +0,0 @@
----
-title: 'new course : parallel 1'
-content:
-    items: '- ''@self.children'''
-    order:
-        by: date
-        dir: desc
-    limit: '5'
-    pagination: '1'
-    url_taxonomy_filters: '1'
-hero_classes: ''
-hero_image: ''
----
-
-new course : parallel 1
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
-
-Ya es possible hacer
-I can here :
-- write a full "parallel 1 course" if required
-- or add add a few word about a "course parallel 1" that is written somewhere in "pages/curriculum/..."
-- or do nothing.
-
-    Go 
-    
-    [there](http://localhost:8000/en/m3p2-curriculum/physics-chemistry-biology/niv3/Geometrical-optics/geometrical-optics-general/geometrical-optics-validity/geometrical-optics-domain-of-validity-overview)
-    
-    [Current chapter](.)
-    [Parent chapter](..)
-    [Sibling chapter](../another-chapter)
-    [Child chapter](chapter)
-    [Anchor in the page](#slug-of-header)
-
-<details markdown=1>
-<summary>
-TOWARDS parallel 1, if their are several
-</summary>
-This is a text
-```math
-f\colon\left\{\begin{aligned}\mathbb{R}_4[X]&\longrightarrow\mathbb{R}_4[X] \\
-P&\longmapsto P’\end{aligned}\right.
-\qquad
-g\colon\left\{\begin{aligned}\mathbb{R}_2[X]&\longrightarrow\mathbb{R}_2[X] \\
-P&\longmapsto XP’+P\end{aligned}\right.
-```
-</details>
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.es.md
deleted file mode 100644
index c10bf6246..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.es.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-title: 'nuevo curso : paralelo 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nuevo curso : paralelo 1
-
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.fr.md
deleted file mode 100644
index 5f25d7fed..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/04.new-course-parallel-1/default.fr.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-title: 'nouveau cours : parallèle 1'
-hero_classes: ''
-hero_image: ''
-content:
-    items: '- ''@self.children'''
-    limit: '5'
-    order:
-        by: date
-        dir: desc
-    pagination: '1'
-    url_taxonomy_filters: '1'
----
-
-nouveau cours : parallèle 1
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.en.md
deleted file mode 100644
index d717c9a0a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.en.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'new course : parallel 2'
----
-
-new course : parallel 2
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.es.md
deleted file mode 100644
index e53f6f78b..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.es.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nuevo curso : paralelo 2'
----
-
-nuevo curso : paralelo 2
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.fr.md
deleted file mode 100644
index cd5868bd3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/05.new-course-parallel-2/form.fr.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-title: 'nouveau cours : parallèle 2'
----
-
-nouveau cours : parallèle 2
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.en.md
deleted file mode 100644
index 70107fd31..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.en.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'course : level-1'
----
-
-course : level-1 
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.es.md
deleted file mode 100644
index 275c981f4..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel-1'
----
-
-curso : nivel-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.fr.md
deleted file mode 100644
index f3b1ebb60..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/06.course-level-down/page.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau-1'
----
-
-cours : niveau-1
-- or level+1 if current level = 1
-- or level-2  if current level = 4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.en.md
deleted file mode 100644
index 4f2a994ae..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.en.md
+++ /dev/null
@@ -1,18 +0,0 @@
----
-title: 'course : level+1'
-hero_classes: ''
-hero_image: ''
----
-
-course : level+1
-
-or level+2 if current level=1
-
-or level-1 if current level=4
-
-#####for parallel or other level course :
-It will be possible to redirect towards an other page in the m3p2 cursus.
-Or to write here some paragraphes separated by html from an other pages, I think.
-Or write here a completely new parallel course
-
-For the moment, please wait.
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.es.md
deleted file mode 100644
index 380d15135..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.es.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'curso : nivel+1'
----
-
-curso : nivel+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### para un curso paralelo o de otro nivel:
-Será (ya es) posible redirigir hacia otra página en el cursus m3p2.
-O escribir aquí algunos párrafos separados por html de otras páginas, creo.
-Tambien podemos aquí escribir un curso paralelo o de otro nivel completamente nuevo
-
-*Por el momento, por favor espere*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.fr.md
deleted file mode 100644
index e3b3ba33e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/07.course-level-up/portal.fr.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'cours : niveau+1'
----
-
-cours : niveau+1
-or level+2 if current level=1
-or level-1 if current level=4
-
-##### pour un cours parallèle ou d'un autre niveau
-Il sera posible (cela l'est déjà) de rediriger automatiquement vers une autre page dans le cursus m3p2.
-Ou d'écrire quelques paragraphes avec entre du html emprunter à d'autres pages je pense.
-On peut toujours aussi écrire ici un cours parallèle ou d'un autre niveau complétement nouveau
-
-*Pour le moment,, attendre, SVP*
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.en.md
deleted file mode 100644
index b2b0aee09..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.en.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: Mirror
----
-
-Miroir sphérique,
-Miroir plan
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.es.md
deleted file mode 100644
index f2cf93daf..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.es.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: 'Le miroir'
----
-
-Miroir sphérique,
-Miroir plan
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.fr.md
deleted file mode 100644
index f2cf93daf..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/04.mirror/topic.fr.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: 'Le miroir'
----
-
-Miroir sphérique,
-Miroir plan
\ No newline at end of file
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.en.md
deleted file mode 100644
index 57328b3af..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Veo objetos, me doy cuenta y miro imágenes.'
-slug: object-image-in-geometrical-optics
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.es.md
deleted file mode 100644
index 57328b3af..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Veo objetos, me doy cuenta y miro imágenes.'
-slug: object-image-in-geometrical-optics
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.fr.md
deleted file mode 100644
index f051c73f2..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/03.object-image-in-geometrical-optics/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Je vois des objets, je réalise et regarde des images'
-slug: object-image-in-geometrical-optics
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.en.md
deleted file mode 100644
index b058372e1..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'The human eye'
-slug: eye
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.es.md
deleted file mode 100644
index bd57912ac..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Le fonctionnement de mon oeil'
-slug: eye
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/topic.fr.md
deleted file mode 100644
index bd57912ac..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/01.eye/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Le fonctionnement de mon oeil'
-slug: eye
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.en.md
deleted file mode 100644
index 06086e5ff..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'The vision in relief'
-slug: relief-vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.es.md
deleted file mode 100644
index ed2fa5fad..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/textbook.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'La vision en relief'
-slug: relief-vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/topic.fr.md
deleted file mode 100644
index ed2fa5fad..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/02.relief-vision/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'La vision en relief'
-slug: relief-vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.en.md
deleted file mode 100644
index 493aac5b0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'My vision, performance and limitations, defects and corrections'
-slug: vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.es.md
deleted file mode 100644
index d6955474a..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/default.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Mi visión, desempeño y limitaciones, defectos y correcciones'
-slug: vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/topic.fr.md
deleted file mode 100644
index 802f33e49..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/04.vision/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'Ma vision, performances et limitations, défauts et corrections'
-slug: vision
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.en.md
deleted file mode 100644
index 4b5d3f328..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'I know optical instruments'
-slug: optical-instruments
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.es.md
deleted file mode 100644
index 89ed909f0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/default.es.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'J''utilise des appareils optiques'
-slug: optical-instruments
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/topic.fr.md
deleted file mode 100644
index 89ed909f0..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/05.optical-instruments/topic.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: 'J''utilise des appareils optiques'
-slug: optical-instruments
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.en.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.en.md
deleted file mode 100644
index b5441da26..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.en.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'I see bodies, make and watch images'
-slug: optics
-published: false
-visible: false
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.es.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.es.md
deleted file mode 100644
index 042b81ae3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.es.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'Observo objetos, hago y miro imágenes'
-slug: optics
-published: false
-visible: false
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.fr.md b/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.fr.md
deleted file mode 100644
index 36f7940b9..000000000
--- a/01.curriculum/01.physics-chemistry-biology/01.niv1/07.optics/topic.fr.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-title: 'J''observe des objets, réalise et regarde des images'
-slug: optics
-published: false
-visible: false
----
-