diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md
index b92c8ca55..9ec559b38 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md
@@ -1,4 +1,4 @@
---
+---
 title: Brainstorming on the mathematical tools required at each level
 published: true
 routable: true
@@ -12,4 +12,23 @@ lessons:
 
 #### Brainstorming on the mathematical tools required at level 2
 
---------------------------------
\ No newline at end of file
+--------------------------------
+
+with a **first classification to order the brainstorming a little** (counting, geometry, etc.).   
+It *does not presage chapter titles *.
+
+Feel free to create a new classification if necessary.
+
+
+! *xxx*
+!
+
+(XXX-YY)
+...
+
+--------------
+
+(XXX-YY)
+...
+
+-------------- 
\ No newline at end of file