There are not many knowledge points in each edition of junior high school textbooks, but the order and emphasis of teaching are different. For the ninth grade students, what version is not very important, just to see if it suits them.

I guess you should use it for your own review, so you should look for more comprehensive review materials:

First, the summary of knowledge points should be comprehensive. Before reading examples or doing exercises, we should review the key knowledge points of this part of the content, and check for missing parts;

Second, three-dimensional should have a detailed explanation, analysis process, pay attention to the writing of steps;

Third, the exercises should be difficult and difficult, so as to test what level you have mastered;

Fourth, the answers to the exercises should be detailed, not just numbers or final results, in case you can't learn when you can't do it.

The workbooks I often use above have several "point push" problems, which are suitable for tall students; "Three-year Simulation of Five-year Senior High School Entrance Examination" (referred to as "53") is moderately difficult; Complete interpretation of the senior high school entrance examination. I want to find a workbook that suits me, and I often go to the bookstore to have a look.

Personal suggestion: Don't have too many workbooks in each subject. Two workbooks are enough. As long as you fully absorb and master all the knowledge points and exercises in the two workbooks, your grades will be very ideal. The most taboo in learning is that there are too many workbooks, and then that one is useless.

Students, take the time to review, and use the final results as a reward for your efforts! !