My sister's math performance is poor, and I haven't read many books, so I can't help her. I want to enroll her in a cram school to study math. She is now in the second grade, and she had a tutor before. Mathematics is not a problem that can be solved by enrolling in a cram school. The most important thing is to rely on yourself, listen carefully in class, finish your homework carefully, learn to think independently, preview in advance, and ask your classmates who are good at math. The most important thing is to do a lot of exercises and find out the methods and ideas to solve the problem through practice.