You need to consolidate the foundation of high school mathematics first and be able to cope with the difficult problems under the knowledge system of high school mathematics. To master the knowledge of high school mathematics, you need to study all the required courses, and choose 2- 1, 2-2, 2-3. Textbooks in other fields can also refer to the following knowledge points to learn from the most basic: function, triangle, derivative, inequality, three-dimensional, analysis, probability.
You can learn according to the course order of the textbook, and you should also refer to the teaching AIDS when learning the textbook, so as not to miss some knowledge points.
After being familiar with the teaching materials, the application of skills is also important. College entrance examination knowledge and problem-solving skills should be integrated. If you really can't learn the overall knowledge structure, you should also learn the basic usage.