Useful, self-study, turn over the books, write the knowledge points by hand, copy the formula three times, and memorize the formula the next day. I understand the example and do it again by myself. It is absolutely no problem to study in this way, that is, you must accept knowledge quickly, otherwise it will be too late for a summer vacation.

Junior high school mathematics is very simple. Mastering the learning method, it is not a problem to get more than 95% of the test paper with a score of 100.

I wish your family happiness and a happy life! If you are satisfied, please adopt it, thank you!