We must attach importance to these subjects in Chinese class. As long as you know science, it can also save your brain. Our teacher only reminds us to listen to the key points in math class. Regardless of good students, the most important thing is to choose the key points by ourselves.

You must understand the questions you can't, and you can't have all the time to ask Xueba or ask the teacher.

Taking good notes, especially many formulas in English, can't be remembered by your brain alone.