diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md
index 7fcda6cc3..fc590997c 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md
@@ -10,7 +10,7 @@ lessons:
       order: 3
 ---
 
-### Define the mathematical tools required at each level
+#### Define the mathematical tools required at each level
 
 --------------------