If you are in high school or junior high school, I suggest you buy a reference answer book with a problem-solving process. Books such as detailed explanations of teaching materials are attached. I used this book in high school. The slightly more difficult questions have a process, and the others only have the final result. The examples and exercises are similar to those in the nuclear textbook. I can't do it, so I often read similar questions before doing them. But this requires you to have a certain consciousness, that is, although you read the answer, you want to find out what is going on. Generally, I do it myself first, and it can't be done in 10 minutes. I marked it, looked through the reference books and finished it with them. Finally, I recall the topic of the mark myself. When reviewing, I will also focus on these issues. If you can't figure it out all the time, ask your classmates the next day, or the teacher will say it.

This method is risky and useful to me. See if it suits you.

If you go to college, in fact, I think the same is true in college, but the reference book method is more applicable ... Because the teacher can hardly speak, among the students, everyone is free to move, and people who study often can't even find a personal image during self-study, so it is basically impossible to stay in the dormitory every day. ...

exceed ...

I often spend two or three hours doing my homework there. In fact, the question I came up with impressed me the most.