diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.fr.md
index bcb1a9c76..ba1bbfa59 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.fr.md
@@ -6,6 +6,8 @@ visible: false
 lessons:
     - slug: brainstorming-123-mathematical-tools
       order: 2
+    - slug: brainstorming-g12-mathematical-tools
+      order: 3
     - slug: brainstorming-234-mathematical-tools
       order: 1
 ---