After two years of preparatory classes at Lycée Louis-le-Grand (Paris), I returned to my first year at Télécom ParisTech school (engineering school). Having already given courses from the 4th to the Terminale, I offer courses in Paris on mathematics for all levels, from high school to high school. My main axes are: - help with homework ; - preparation for the Baccalaureate examinations; - explanation of the course; - deepening exercises for the most motivated. I emphasize the understanding and the student starting from the following observation: if he does not understand a notion, it is because he can not make it correspond to an object of the life of all the days. So I often use analogies with marbles or cakes, which have proven themselves to my previous students.