Update cheatsheet.en.md

88c77325 · Claude Meny · 76aaa374 · 88c77325
Commit 88c77325 authored Jan 17, 2026 by Claude Meny
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cheatsheet.en.md ...5.waves-introduction/10.waves-in-physics/cheatsheet.en.md +2 -2

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--- a/10.temporary-m3p2/16.waves/20.n2/05.waves-introduction/10.waves-in-physics/cheatsheet.en.md
+++ b/10.temporary-m3p2/16.waves/20.n2/05.waves-introduction/10.waves-in-physics/cheatsheet.en.md
@@ -12,8 +12,8 @@ lessons:

 *Course under construction*, **not validated**. 
 ![](https://m3p2.com/fr/temporary_ins/images/M3P2-validity-state-EN_L1200.jpg)   
-![](https://m3p2.com/fr/temporary_ins/images/M3P2-maturity-2_L1200.jpg)<details>
-<summary>Stage 2 : In structuring</summary>  
+![](https://m3p2.com/fr/temporary_ins/images/M3P2-maturity-7_L1200.jpg)<details>
+<summary>Stage 7 : Tested with students</summary>  
 1. Brainstorming
 2. In structuring
 3. In writing : 1/3