When you decide to learn a math course, the first thing is to know for what purpose (in two words...), from what perspective you are learning it. Indeed, for the brain, the project is very important. If you want to be effective, you have to have the right project. If we learn our lesson for the next lesson, the next question or the next supervised assignment, we will have forgotten it right after. It's a shame, because in math, everything fits together. The course builds on what we have done in previous years. That's why it's particularly annoying if you pick up at any given moment...