I graduated with a doctorate in physics from the University of Lorraine, and currently I am a postdoctoral researcher, and I give private lessons in my free time in order to help students concretely understand the scientific modules (Math, physics and chemistry). My methodology consists firstly of generalizing the content of the material studied by clarifying to students the content and applications of what are being studied, then helping them to understand the physical (concrete) meaning of the mathematical formulas studied. , and finally, to know how to use these formulas to solve problems using tutorials.