Update textbook.en.md

5 years ago · 0591d52fbc
1 changed files with 3 additions and 2 deletions
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n1/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n1/textbook.en.md
@ -10,5 +10,6 @@ lessons:

 #### Brainstorming to structure a theme "Electromagnetism" : level 1

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+This step is important, because it will be the 
+**first tree structure of the filesystems and subfiles in which the contributors will work**. 
+This tree structure may evolve, but it is less agile than the pedagi