diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n1/10.brainstorming/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n1/10.brainstorming/textbook.en.md
index 9036e4df2..6aaf8d835 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n1/10.brainstorming/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n1/10.brainstorming/textbook.en.md
@@ -8,12 +8,12 @@ lessons:
       order: 1
 ---
 
-This level 1 brainstorming can be seen in its multilingual version at: 
+#### Brainstorming to structure a theme "Classical mechanics" : level 1
 
-https://m3p2.com/polyglot/brainstorming-pedagogical-teams/synthesis-structuring/classical-mechanics/n1/brainstorming
+--------------------------------
 
--------------------------------
+This level 1 brainstorming can be seen in its multilingual version at: 
 
-#### Brainstorming to structure a theme "Classical mechanics" : level 1
+https://m3p2.com/polyglot/brainstorming-pedagogical-teams/synthesis-structuring/classical-mechanics/n1/brainstorming
 
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+-------------------------------
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