I am finishing my studies at EPFL, so my level in mathematics is quite high. However, when I was in school, I had some difficulties. Despite this, I managed to find explanations that convinced me and that allowed me to progress in math: I went from a poor student to the best student in the class! As I have encountered difficulties myself, I know how to explain to a student who has difficulties too. Sometimes you just have to put it differently to make it clear!