---
title: Brainstorming on the mathematical tools required at each level
published: true
routable: true
visible: false
lessons:
    - slug: define-234-mathematical-tools
      order: 3
    - slug: define-4-mathematical-tools-polyglot
      order: 3
---

#### Define the mathematical tools required at level 4

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with a **first classification to order the brainstorming a little** (counting, geometry, etc.).   
It *does not presage chapter titles *.

Feel free to create a new classification if necessary.


! *xxx*
!

(XXX-YY)
...

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(XXX-YY)
...

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