There are only a few key points in high school mathematics, such as trigonometric function, probability, solid geometry, elliptic hyperbolic parabola (analytic geometry), function and sequence. As long as you can review every point of this year, sort it out systematically and practice more, it is absolutely no problem. You failed in the math exam now because you didn't study at all, and you didn't even figure out what the questions were in the paper. My advice to you is that you don't need to arrange the teacher's time in advance, just consolidate the knowledge points thoroughly. The second round of review depends on yourself, look at the original questions of the college entrance examination and summarize them yourself. There is no need to do more difficult questions in the third round of review. You should find the questions that you can score, practice hard, and never lose points in the exam. This is what you should do.
Well, this is my advice to you as an experienced person. Although my grades are not very high, I still have some experience in repeating. I hope your college dream can be successfully completed.