diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/instructions-for-levels/10.main/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/instructions-for-levels/10.main/textbook.fr.md
index b464607f6..3fdfe3d68 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/instructions-for-levels/10.main/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/instructions-for-levels/10.main/textbook.fr.md
@@ -8,7 +8,7 @@ lessons:
      order: 1
 ---
 
-### Brainstorming partie "Principal"
+#### Brainstorming partie "Principal"
 
 Un rappel de ce qui est annoncé sur les 3 parties de cours est à :<br>
 https://m3p2.com/fr/m3p2_pedagogy/m3p2-pedagogy