You take out the math books for the fifth and sixth grades, starting from the fifth grade. Review by yourself, look at the examples first, and then do it by yourself. So review the books in the sixth grade. As long as you persist, your math scores are above 90. I'm also a sixth grader. I suggest that you ask your parents to enroll you in a sixth-grade math promotion class. It doesn't matter whether the school is good or not, what matters is whether you study hard or not. Also, if you have time, take out all the books in grades 4 and 5 and review them. If you don't have time, review the key points. Believe me, because I'm only a freshman, with Chinese 9 1 and math 96. My grades are almost the same as yours, but now I'm fine.