High school math is really difficult for girls. . If your sister's grades are average, instead of pursuing difficult problems and getting high marks, I suggest your sister carefully read the examples in the book. In fact, many questions come from textbooks. If you can finish it well, you can choose this extracurricular tutoring.

For example, the newly published "Three Steps" series of senior high school mathematics attached to Beijing People's University (three books: Thinking Methods of Solving Problems in Senior High School Mathematics, Analysis of Common Errors in College Entrance Examination and the Second Round of Special Lecture on College Entrance Examination Mathematics) is a set of step-by-step learning methods carefully developed by teachers of the senior high school attached to Beijing People's University, which is characterized by detailed explanation, comprehensive content, emphasis on methods, helping candidates to seek teaching ideas and quickly improve their grades, and is shared by students of all grades. This is a rare set of good information.

In fact, the most difficult thing for high school students is the pressure they bear. I am a sophomore now, and I can deeply understand their difficulties, so I still need you to communicate with them more. .

I hope your sister can get good grades!