Two-speed learning method, I will use this Chinese.

English mathematics and physical chemistry don't need reference books, because they are all answers. So you'd better buy some exercises to do, or refer to the answers if you can't. Recommend Meng Jianping.

As for history, I still recommend you to teach and learn. There are exercises, intensive reading classes and some extracurricular materials, which are very good.

Students in the upper and middle reaches can do some difficult problems, and they can buy the Hope Cup math competition book of the national math competition to do it, which explains it very well.

I hope my study is as smooth as mine!