As long as you don't study mathematics, the intelligence factor in learning mathematics is not the dominant factor. I suggest you build up your interest in mathematics by reading extensively the stories of some mathematicians, such as Euler, or learn something about the history of mathematics. Then study hard. Mathematics in junior high school is not difficult. Generally speaking, it is enough to understand an extracurricular material plus school materials. I suggest you preview this extra-curricular material in advance. It's best to finish it when previewing. The effect will be very good. If not, just recall your knowledge or Baidu. At the beginning of preview, you may find it difficult and inefficient to do the problem, but you should insist on understanding the problem and learn from the teacher after understanding it. You will find that the teacher speaks too slowly. Preview is really important. That's what I did in high school After I finished high school mathematics in the summer vacation and then made other difficult materials, high school mathematics became the simplest course in my eyes. When I was in 1 grade. In the second day of junior high school, I was not good at math, and sometimes I got points. However, after I previewed the knowledge of senior three in senior two, my grades improved. When I was in the third grade, I previewed the compulsory mathematics I and IV, and I didn't have time to manage the knowledge of junior high school, which led to unsatisfactory math scores in the senior high school entrance examination, but the learning foundation of senior high school mathematics was not solid. I suggest you don't need to go to cram school. It may be psychological factors that lead to poor self-study effect. I suggest you preview 53, even if there is no textbook, there is a list of knowledge on it, so you can learn by yourself. In addition, it is not difficult to do math in grade one, and it is not difficult to make it up. Learning any subject requires interest, unremitting efforts and courage to overcome suffering.