The second is to think hard. Following the teacher closely in class, the key is to listen to the teacher's ideas when explaining examples, and to understand and master them one by one!

The third is hard training. Choose representative questions when practicing. To learn math well, you must practice more. If you don't practice much, you will definitely be unfamiliar. If you are not skilled, you are not sensitive enough to the topic and the method is single. So I think what we need to do now is to do more exercises and then think about each exercise. What do these exercises have to do with the lessons we have taught? Such an idea can broaden your mind.