I can read between your lines that you like studying very much. I can tell you how to study math. Whether you learn math well in high school is up to you. Diligence can make up for the lack of teachers. If you are already a master, consider me talking nonsense. If you study math in general, you can listen carefully.
If you want to learn math well, you must have the spirit of not being afraid of death. The specific methods are as follows: find a set of exercises, depending on your level, buy exercises higher than you said, and have detailed answers. From the first set to the last set, do one set, do one set, and the wrong questions must be marked. Wrong questions are a good thing and a stepping stone to promotion. Ask your classmates these wrong questions, preferably classmates, sometimes.
What is the spirit of not fearing death? When you encounter a wrong question, you must firmly believe that only by walking can you reach a higher mountain. Mathematics is a subject with slow progress, but it will be stable as long as it goes up a step. Of course, if you reach 135, you can stay here. The college entrance examination must be above 140. If you are still 140, then my method is very feasible, but you must understand the wrong questions, otherwise even if you do more questions, it will be a cloud and mathematics will not progress. Mathematics is a very interesting subject, so you should be interested in it. Do at least two complete sets of questions every week, one of which is completed for two hours at a time. This is a drill for one's own examination room and an appraisal of water quality. Remember, don't be afraid of low marks, that grandpa. Usually, when you do a problem, you should take an exam. Be serious, give yourself a score and a standard, and work harder next time than last time. After a long time, the exam will be normal and conducive to play.
As for teachers, I think I respect teachers very much, but such teachers really dare not compliment.
In high school, no matter how awesome the teacher is, what's more, your teacher is average. I can't guarantee that it is too high. According to my learning method, it is absolutely no problem to improve it to 120. For your teacher, you don't have to adjust him at all, and you must never be soft, otherwise you are likely to suffer. Learning in high school is really basically on your own. Diligence can make up for all shortcomings. Of course, we should properly consolidate the issue of right and wrong. Only study.
It doesn't matter if mom doesn't believe it. Parents believe the teacher's words, but time will surely prove who is right. But now your study is the most important thing, of course, protect yourself.