diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/textbook.en.md
index 0dab838b7..531400049 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/textbook.en.md
@@ -51,22 +51,22 @@ To **communicate my proposals**, either :
 * directly on the GitLab m3p2 with your login/password, and after a little training on Git. 
 
    * *Click on "Edit this course"* at the bottom of each column of this page (levels 1 and 2),   
-or from the page "https://m3p2.com/en/lessons/define-234-mathematical-tools" (levels 2, 3 and 4).
+or of the page "https://m3p2.com/en/lessons/define-234-mathematical-tools" (levels 2, 3 and 4).
 
-   * If you prefer *to see in full screen each column* on this page, go to :
+   * If you prefer *to see in full screen each column* on this page, go to :   
 For these *general instructions* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/first-steps   
 For *level 1* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/n1   
 For *level 2* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/n2   
 For *level 3* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/n3   
-For *level 4* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/n4
+For *level 4* : https://m3p2.com/en/brainstorming-pedagogical-teams/synthesis-structuring/math-tools/n4   
 then *to contribute*, click on "*Edit this course*" at the bottom of the page. 
 
 * *In the M3P2 Googledoc* whose link has been given to you.   
 The contribution is to be made in the "Herramientas matemáticas" folder, in the words documents :
-   * for *level 1* : Niv / Lev_MatToo_1.docx
-   * for *level 2* : Niv / Lev_MatToo_2.docx
-   * for *level 3* : Niv / Lev_MatToo_3.docx
-   * for *level 4* : Niv / Lev_MatToo_4.docx
+   * for *level 1* : Niv/Lev_MatToo_1.docx
+   * for *level 2* : Niv/Lev_MatToo_2.docx
+   * for *level 3* : Niv/Lev_MatToo_3.docx
+   * for *level 4* : Niv/Lev_MatToo_4.docx
    
 The Gitlab will be kept up to date with your proposals, also translated into English and Spanish.    
 _(This is not required, but if you can also make your contribution in French, more in_