diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
index 85eed8113..9ddf16249 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
@@ -6,6 +6,8 @@ visible: false
 lessons:
     - slug: definir-234-outil-mathematique
       order: 3
+    - slug: define-4-mathematical-tools-polyglot
+      order: 1
 ---
 
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