I don't know how your math is. If you are good at math, you can review the contents of the senior high school entrance examination in advance. If you are not good at math, don't review what you have learned before, including primary school. You just need to learn it well before. Mathematics is a basic subject, and what kind of foundation there is will lead to what kind of achievements, which cannot be improved for a while. To learn mathematics well, we should pay attention to the learning process.