This is my learning method, you can have a look.
1 Make sure that you are not distracted in class and the teacher listens carefully (this is very important, as long as you can ensure this, you don't have to preview before class).
Do your own homework, don't discuss it, don't copy it, and ask the teacher if you really can't (the teacher will guide you to think, and if you ask your classmates, he will definitely tell you the answer directly).
Communicate with teachers more. I say this because I have personal experience and often chat with my teacher, and you will find the teacher very friendly. Before you know it, you will pay attention to this subject and learn it.
I hope it works for you.