This course is designed for high school students who want to strengthen their skills in mathematics and physics. It follows the official curriculum and emphasizes understanding fundamental concepts, solving typical exercises, and effective exam preparation. In mathematics, we will cover functions, derivatives, integrals, sequences, probabilities, and linear algebra. In physics, we will study kinematics, dynamics, electricity, waves, and thermodynamics. In chemistry, we will cover chemical reactions, equilibria, stoichiometry, atomistics, and organic chemistry. The course is structured in a progressive manner, with clear explanations, concrete examples, and numerous corrected exercises. It is aimed at students of all levels—beginners, intermediate, and advanced—and is also suitable for students preparing for the baccalaureate exams or competitive exams.