There are two reasons. First, if your math scores are not ideal and difficult, you are not interested. Second, you don't recognize or admire the math teacher's lectures. If the level of lectures is limited and you don't want to listen, you are willing to be sleepy. But you should know that learning is not for others, but for yourself. If you find the reason, you must correct it. If you can't keep up, you must start to make up lessons where you can't keep up. You must be eager to learn. Mathematics is the main course, without which you can't take the exam. As for the understanding of people, it depends.

Hope to adopt