If you want to improve your academic performance quickly, you need to find out the reasons for your poor academic performance. If your study time is short, it should be effective to extend your study time, but if your study time is "full", it will be counterproductive to add more time.

If the foundation is not good, it is necessary to make up the foundation, but the improvement of the foundation cannot be completed overnight.

I can only give two suggestions:

1, learn everything by methods, such as learning mathematics by mathematical methods. I find that many people learn mathematics in a "Chinese-style" way, relying on rote memorization and being inflexible; Some science students use mathematical methods to learn Chinese and always emphasize logic. In fact, the most important thing in Chinese is not logic, but proficiency and accomplishment.

2. Communicate with your classmates more, because their grades are not necessarily the best; You can find another tutor if you can.