Professor with over thirty years of experience in the region in academic support, multi-disciplinary training, mathematics degree and scientific doctorate, gives courses in mathematics, physics, chemistry, Swiss, French and international programs, pre-gymnasium, gymnasium, Geneva college, private schools, Léman college, Moser, Pareto Institute, first cycle university, preparation for HEC and EHL Lausanne. The course is tailored to each student's individual needs. Student participation is essential, and I encourage dialogue, as my experience has shown me that this is often how misunderstandings and gaps in knowledge are identified. The course does not replace the need for independent study, which relies primarily on numerous exercises and working through their solutions. I remind you that true mastery only comes when you can solve an exercise independently, without errors.