Doctor in biological engineering and professor of sciences (Biology, chemistry and physics) in upper secondary education, I propose courses in mathematics (algebra, geometry, analysis, problem solving ...) physics (mechanics, electromagnetism, nuclear. ..), chemistry (mineral and organic) and biology (general animal and plant, animal and plant physiology) following the teaching syllabus for secondary school students (lower and upper) as well as for high school graduates and masters (except for civil engineers). After a diagnosis made with the student, a working method is developed so that the learning is done for the best for the student. Specifically with regard to high school students, previous student assessments can also be used as a basis for work or at least supplement it to keep up with the requirements of the faculty of the student's school.