Most people say that although their grades are not outstanding, they still have basic learning ability. Their ability to learn a subject is always better than before. But students with high scores rarely apply for normal education. If the learning ability is not very strong, it is even difficult to link with the total score of some subjects. Math and physics in high school can be a torture.

Even for teachers' majors in sports, fine arts, music and other arts, the minimum control score of cultural courses is around 300, and the score of professional courses far exceeds 200. At present, teachers' grades are declining or there is no other purpose, let alone looking at some problems with old eyes. Because the entrance of normal students is limited by certain achievements, it is impossible to follow one's inclinations, nor can it be as low as this.

This is the case with high school teachers. They all went to college, and many of them were masters and doctors. From the university point of view, high school mathematics is not difficult. With the knowledge reserve of the university, it is easier to understand the content of high school. Finally, teachers don't need the college entrance examination, they have the answers. When they encounter some unanswerable questions, they will still talk to students after seeing the answers.

I think another important reason is that teachers have enough time and energy to devote themselves to a certain subject. Compared with studying different subjects at school, teachers only face one subject. I believe that in this world, only when most people devote their time and energy to a certain field can they master it. Few people can reach "full marks" when they start working. The same is true of teachers.