1 class efficiency
You must not be careless in class, take notes carefully and go to class with questions.
2. Preview before class
Some people think that the preview before class is likely to be invalid, so they don't do it, and the teacher hasn't handed it in. In fact, even if it's hard to understand, you should read it. Even if the effect is checked again, it is better than no effect.
Review after class
Reorganize the class notes, you can refer to your classmates, provided that you also take class notes. Compare the two, what knowledge points are you missing from him, and improve them.
practise
In fact, I want to say at the end, not that he is not important, but the most important! "Practice makes true knowledge" is an unchangeable truth. You may understand the topic, but in fact you may not be able to do it! Don't be self-righteous, try to do the problem patiently, and you will find many problems, such as knowledge points and problem-solving skills that you usually ignore, and a series of problems will be exposed. "The devil hides in the details"!
The above suggestions are for my reference only, and I hope they will help you with your math.