Understanding and mastering a subject requires developing an intuition: in order to know which method to apply to solve a given problem, one must also understand why these methods work. My goal is to support each student in the development of this intuition through simple illustrative examples, while maintaining a constant dialogue in order to identify errors in reasoning. The course of each session adapts to the needs of each student. A course typically takes place as follows: (i) Planning the session according to the student's needs (material covered in class, homework to be completed, tests, subjects not understood, etc.) (ii) Presentation of the material (iii) Illustration of the material by examples (iv) Summary of key points and planning for the next session