When previewing, mark what you have learned and what you are not clear about. In class, focus on what you won't know after preview.
Then do more questions to consolidate what you have learned. On the one hand, we can strengthen our understanding and memory of what we have learned. On the other hand, you can test whether you have learned something you don't know. If you still haven't learned it, you can ask your classmates or teachers.
Usually, you can write down the key knowledge points in the notebook and make a wrong book, so that you will have a clear direction when reviewing and will not waste time.
The last point, which is also very important, is to have confidence in yourself and say to yourself once a day, "I can learn math well."
Mathematics is not terrible, it can be conquered.
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