At present, the common class teaching AIDS in the market are: 53, experimental classes, all-round excellent programs, and upgrading training. I haven't seen it, but according to my classmates' reaction, it's ok. There are some problems, but it's still simple.

The experimental class is good at science and is used in JL middle school in our city. The overall difficulty is not great, and some questions are a bit repetitive, which is very annoying to do. But some questions are difficult. It is recommended to use every day.

I was cheated by my classmates into buying a math book. Some of the questions are good (in what competition space and topic). I personally don't recommend them because they are not difficult.

The most recommended all-excellent scheme. Because the difficulty is moderate, it is a bit interesting. It's similar to walking into the heavy class edition. Generally speaking, our school will assign homework. I use math by myself, and the last question in each class is quite powerful. In addition, I can do the second section (the section behind the foundation) well, and I can almost cope with the exam.