With a PhD in Chemistry and several years of experience in scientific research at the University of Paris-Saclay, I offer mathematics, physics and chemistry lessons for middle and high school students. The lessons are fully adapted to each student's level and pace. They combine: -a clear explanation of the theoretical concepts, -numerous application exercises to reinforce understanding, -personalized homework help, -and effective preparation for exams (brevet, baccalaureate, tests). The goal is to help each student better understand scientific subjects, acquire solid study skills, and regain confidence in their abilities. The sessions take place in a supportive and motivating atmosphere, making learning synonymous with success and the joy of learning.