First, only accept knowledge. For the classroom, we are just accepting the knowledge taught by the teacher. At this time, most children can understand, and many children listen carefully, but after class, they will find that they can't do these questions at all. This is actually because we only accept the topic and don't think about it. What's the use if we only listen to what the teacher says when we study, and don't practice the operation ourselves?
Second, the important thing in mathematics is the method. In mathematics, the most important thing is the method. If we can master the methods, if we can learn to draw inferences from others, then even after class, we can know how to use these methods in the exam. Therefore, listening carefully in class can only show that we understand it in class, but this does not mean that we can learn to do problems after class, because we may only understand superficial things in class.
Third, fake efforts At the same time, we can also think about whether there is a phenomenon of fake efforts in class, because many people just listen carefully in class, play after class, and even spend a lot of time playing. Then this phenomenon can be said to be a false effort. If we listen carefully in class and don't review after class, then we can't understand how to listen. I believe that many people, not gifted people, can try to understand this knowledge through class, so the most important thing for us is to listen carefully in class and review and summarize after class. And to learn how to apply these methods to practice, which requires us to constantly review and consolidate every day.