Engineer in nuclear engineering, Doctor of Physics, former Assistant Professor of Physics at the University, Examiner in preparatory class, and Professor of Mathematics at the Lycée, I offer support: Mathematics and in Physics-Chemistry in the French system up to the Scientific Terminal Mathematics in the Quebec system up to Cégep Science de la nature Mathematics for the preparatory year at HEC Montréal The purpose of the first meeting is to get to know the student and to determine his current level in mathematics and / or physics-chemistry, what are his strengths and weaknesses, and what are the objectives to be achieved. From the observation, I establish with the student and his parents an educational assessment (notions to be reviewed as a priority, working method, duration and frequency of lessons) aimed at best meeting the student's objectives. My methodology consists of first acquiring a good and deep understanding of the different aspects of the course and then sifting through the exercises and problems that allow the student to understand the usefulness and the extent of the effectiveness of each theorem or trick. . At the end of a session, I make sure that several objectives are met: -Have helped the student to master his course from start to finish, -Having helped the student to do but especially to understand the exercises while ensuring that the writing of the solution is correct and rigorous. -Present methods and tips that the student can use and reuse in multiple situations, it happens as follows: I solve with the student an exercise with the spirit of resolution done in class, then I present him a method of resolution alternative if I consider that this can be used in other exercises. This methodology has paid off from my experiences with a multitude of students of different levels, understanding the course and mastering the exercises makes the student average rise very quickly. Finally, the lessons can also take place remotely if that suits the student.