Do more basic problems, since it is zero-based, we should focus on the basic aspects, you can go to math cram school or ask a tutor. . . . . . However, it is best to study math every day. As long as you can stick to the first half of senior three, the second half is easy to say. Don't buy more teaching AIDS, just make a good one. Don't jump too hard. It is not good to do college entrance examination questions at first. You'd better buy some basic questions and practice. . . . . .