diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/textbook.fr.md
index bb7353a31..325dede89 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/textbook.fr.md
@@ -1,13 +1,11 @@
 ---
-title: Brainstorming sur les outils mathématiques requis à chaque niveau
+title: Définir les outils mathématiques requis au niveau 1
 published: true
 routable: true
 visible: false
 lessons:
     - slug: definir-g12-outil-mathematique
       order: 2
-    - slug: define-1-mathematical-tools-polyglot
-      order: 1
 ---
 
 <!----------------------------------------------