Because of the needs to understand what's nature is made of: its constitutive, forces, interactions but also tools to study it ... I would like helping a pupil from secondary I and II to help them understanding physics and mathematic class in extra in parallel of their class. Also I would like to helm them doing their homework. I already help siblings for their homework (bacalaureat/Maturité and secondary I brevet) In the need to understand what surrounds us is made of: nature, its forces and interactions, but also the tools to study it, I would like to help secondary I and II students to understand physics and mathematics in parallel to their courses. I would also like to help them do their homework.