diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.en.md
deleted file mode 100644
index 6ed0fb68e..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-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/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.es.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.es.md
deleted file mode 100644
index 790efacea..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-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/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.fr.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-beyond/annex.fr.md
deleted file mode 100644
index 0619fc5f7..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/03.optical_path/03.optical-path-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>