The most important thing in learning mathematics is to be good at thinking. If you compare mathematics to a lock, then thinking is a golden key to open the lock of mathematics for you.
For example, some students listen carefully in class and can swallow all the contents of the teacher's speech, but they don't digest or absorb it, and eventually they are "malnourished". Mastered because he didn't develop a good thinking result, he couldn't reprocess what the teacher taught, he couldn't sort it out, and he didn't know the ins and outs of the road. Of course, he can't grasp the true face of knowledge.
We should learn the working methods of bees. Bees can not only collect honey, but also make honey. In this respect, some students do better. They not only listen attentively in class, but also think about the reason of such a solution when the teacher talks about the solution of a certain problem, although the solution of this kind of problem will be introduced later. In this way, the teacher is integrated.