I offer courses in mathematics for (Geometry, arithmetic, algebra), but also for university students (linear algebra, vector calculus, differential equations, complex variable). The course presents a theoretical part, practical exercises, simulations in computer programs like Matlab, Scilab to illustrate the results. I also propose courses in Physics (Classical and Electromagnetism). Practical examples oriented to engineering applications. I propose courses in electronics (Theory of circuits, analog electronics, digital and telecommunications) and Computer science (Programming, Linux). Finally, I offer Spanish lessons. I suggest everyday situations and current conversation topics to improve your level.