diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/40.n4/10.brainstorming/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/40.n4/10.brainstorming/textbook.en.md
index 9fb88ed1f..201954429 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/40.n4/10.brainstorming/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/40.n4/10.brainstorming/textbook.en.md
@@ -22,32 +22,31 @@ https://m3p2.com/polyglot/brainstorming-pedagogical-teams/synthesis-structuring/
 
 A first study plan proposal : 
 
-*MECA-CLAS-Prop1-n4*    
+*BRST-MEC-CLAS4-1* (CLM-FR) study plan proposal 1 :
 
 _React (iscuss, improve) to this proposal, in the text or afterwards,_    
 _starting with 3 initials followed by the two letters of your native language(XXX-YY) :_  
 
-(CME-FR)   
          
-Block-1 - _Possible title :_ 
+Block-1 - _Possible title :_    
           _Short description :_      
           _Program elements, or structure in chapters :_   
           _¿For whom? :_ Anyone who reaches this level 1.
          
          
-Block-2 - _Possible title :_  
+Block-2 - _Possible title :_   
          _Short description :_      
          _Program elements, or structure in chapters :_   
          _¿For whom? :_ _ Anyone who reaches this level 1.
          
          
-Block-3 - _Possible title :_ 
+Block-3 - _Possible title :_    
          _Short description :_      
          _Program elements, or structure in chapters :_   
          _¿For whom? :_ Anyone who reaches this level 1.
 
          
-Block-4 - _Possible title :_ ? 
+Block-4 - _Possible title :_ ?    
          _Short description :_      
          _Program elements, or structure in chapters :_   
          _¿For whom? :_ Anyone who reaches this level 1.
@@ -60,11 +59,10 @@ To carry on
 
 New proposal for a study plan    
 
-*MECA-CLAS-Prop2-n4*  
-
-_Start with your 3 initials followed by the two letters of your native language (XXX-YY)  :_    
+*BRST-MEC-CLAS4-2* (XXX-YY)  proposal for a study plan 2
 
-(XXX-YY)
+_React (iscuss, improve) to this proposal, in the text or afterwards,_    
+_starting with 3 initials followed by the two letters of your native language(XXX-YY) :_ 
          
 Block-1 - _Possible title :_ 
          _Short description :_      
@@ -84,9 +82,7 @@ To carry on
 
 New proposal for a study plan    
 
-*MECA-CLAS-Prop3-n4*  
+*BRST-MEC-CLAS4-3* (XXX-YY)  proposal for a study plan 3
 
-Continuar 
-Continuer 
 To carry on