First of all, you should master the formula skillfully. I suggest you can push the formula in the textbook yourself. Formulas that you push yourself are far more lasting than things that you memorize by rote. Secondly, you should be able to solve all the examples in the textbook skillfully and quickly, and then do the homework assigned by the teacher. If you still have energy, you can find some unfamiliar topics to do extracurricular exercises. Finally, we must persevere, otherwise no matter how good the method is. Mathematics is to practice more questions, but remember not to practice questions for the sake of practicing questions, but to master skills when practicing questions, so as to make progress. I hope it helps you.

By the way, before you find a problem to do, you should analyze it yourself, or ask the math teacher to help you analyze what your weaknesses are now, spend more time on it, and don't ignore your strengths. The college entrance examination needs a balance of all subjects to produce results! Once there is a short-legged subject, the results of the college entrance examination may be beyond your expectation!