diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.es.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.es.md
index 044374cf0..dd677dc3c 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.es.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.es.md
@@ -6,7 +6,7 @@ routable: false
 visible: false
 lessons:
    - slug: simple-optical-elements
-   - order: 1
+     order: 1
 ---
 
 !!!! *CURSO EN CONSTRUCCIÓN :* <br>
@@ -15,4 +15,4 @@ lessons:
 
 <!--MetaDato : ... -->
 
-------------------
\ No newline at end of file
+------------------
diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.fr.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.fr.md
index 9356220a1..f390a0a13 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.fr.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/10.dioptre/20.overview/cheatsheet.fr.md
@@ -4,13 +4,10 @@ media_order: 'dioptre1ok.png,dioptre2ok.png,dioptre3ok.png,dioptre4ok.png'
 published: false
 routable: false
 visible: false
----
-
-<!------
 lessons:
    - slug: simple-optical-elements
      order: 1
-------->
+---
 
 !!!! *COURS EN CONSTRUCTION :* <br>
 !!!! Publié mais invisible : n'apparait pas dans l'arborescence du site m3p2.com. Ce cours est *en construction*, il n'est *pas validé par l'équipe pédagogique* à ce stade. <br>
diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.fr.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.fr.md
index 3261d1bde..20d4bef58 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.fr.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.fr.md
@@ -3,13 +3,10 @@ title: 'nouveau cours : synthèse'
 published: true
 routable: true
 visible: false
----
-
-<!--
 lessons:
    - slug: simple-optical-elements
-   - order: 2
--->
+     order: 2
+---
 
 !!!! *COURS EN CONSTRUCTION :* <br>
 !!!! Publié mais invisible : n'apparait pas dans l'arborescence du site m3p2.com. Ce cours est *en construction*, il n'est *pas validé par l'équipe pédagogique* à ce stade. <br>
diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.es.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.es.md
index df9e37ad0..3d2f505fd 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.es.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.es.md
@@ -6,7 +6,7 @@ routable: true
 visible: false
 lessons:
    - slug:simple-optical-elements
-   - order: 3
+     order: 3
 ---
 
 !!!! *CURSO EN CONSTRUCCIÓN :* <br>
diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.fr.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.fr.md
index bca86a69f..cf0e3377e 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.fr.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/30.thin-lens/20.overview/cheatsheet.fr.md
@@ -4,9 +4,9 @@ media_order: 'lens-convergent-N2-en.jpeg,lens-divergent-N2-fr.jpeg,lens-converge
 published: true
 routable: true
 visible: false
-lessons :
+lessons:
    - slug: simple-optical-elements
-   - order: 3
+     order: 3
 ---
 
 !!!! *COURS EN CONSTRUCTION :* <br>