It is very important to grasp the whole knowledge of mathematics. If the teacher is excellent, he will know the integrity of the mathematical system, and it is good to have a higher level of examination.

If you are not a junior high school student, you can find a good high school teacher to help you with your math (but it's not easy to find, after all, there are specialties in the field); If it is grade three, then find a teacher who specializes in teaching and research in grade three, which is very helpful to improve the score of exam-oriented education.

So generally speaking, unless you know a senior high school teacher with high mathematics quality, comprehensive knowledge summary, clear teaching focus in junior and senior high schools and certain analytical ability, you should choose a senior high school teacher. This kind of teacher is hard to find. Otherwise, you'd better choose an experienced junior high school teacher!