Courses for upper secondary school students of any option as well as university students having difficulties in science. I have a Master's degree in physics with a teaching focus from ULB. I therefore have the agrégation (a teaching qualification) and am a secondary school teacher, and as mentioned, I hold a Master's degree in physics. I place great importance on understanding the student's difficulties and overcoming them with them. I often start with a short reminder to put everything back in place, then I go through the student's course with them, redoing the exercises and inventing examples, while adapting the level of difficulty so that the session is productive. Finally, if desired, I leave exercises as homework to ensure that the student is able to test themselves and apply the concepts seen in class. The student can send me this homework, which I correct for free, with feedback.