Albert Einstein said: "A person who never makes mistakes never does anything new." I am a young student of Master in Theoretical Physics graduated in bachelor of physical sciences and this announcement is addressed to all the students having difficulties in mathematics or in physics. As Einstein told us, it is perfectly normal to encounter difficulties and make mistakes, especially in front of concepts that are often more and more abstract and often badly taught (he himself complained of his own difficulties). I strongly believe that everyone has the ability to understand mathematics and physics. And that's what I'd like to show you by helping you overcome your difficulties. The target audience for these courses is very large, from Secondary 1 to 6 and also for the first years of university.