Hello everyone, My name is Paul-Henry and I am currently a third year engineering student at Centrale Paris on a gap year internship in London. I offer support courses in math / physics for high school students and students in upper classes. After obtaining a bac S with mention TB, I did 3 years of preparatory classes and then joined Centrale Paris. I am convinced that the difficulties experienced by most students are due to a lack of confidence caused by a lack of methodology. And the essential point that I was able to retain from my academic experience is: rigor and method are the key words, in their absence the student will only feel powerless in the face of the exercises that he will have to solve. My methodology therefore consists in acquiring a fine understanding of the course before tackling exercises of increasing difficulty with an emphasis on the resolution process. This allows the student to mobilize his knowledge by demonstrating method and rigor.