My goal is to best answer the student's questions. Each course begins with a session to answer these questions and problems encountered (do not hesitate to send upstream the exos which posed problems). Then two possibilities: either the course is understood and known and we tackle the exercises by choosing the classics to know. Either the lesson is not understood and we take it again. If the course does not "fit", I suggest going through simple exercises to assimilate it. In any case, I adapt and it is possible to send me questions by message between classes. The courses are also an opportunity to come back to advice on methodology and organization. The video courses are given with a tablet and the course is then sent in pdf to the student.