I know it better than the primary school students in Qingdao. I use the Sino-Soviet Education Edition, the Mathematics Qingdao Edition and the English Foreign Teacher Edition.

I strongly recommend:

Language: primary school students understand all the textbooks (some teachers may not allow them to be sold, so it is recommended to buy them in grades 5 and 6 according to their children's situation), step by step, and encyclopedia of primary school students' composition (must buy).

Mathematics: All primary school textbooks are practiced, and oral arithmetic is practiced every day.

English: I know English like the back of my hand (don't forget the tape).