This question will vary from person to person and cannot be completely denied. Because everyone's way of thinking and learning ability are different. All the knowledge in primary school, junior high school and senior high school is actually basic knowledge. China's education is just cramming, leaving learners at a loss. I don't know why I want to learn these things. Some people are bored because of this. If you look at college textbooks, you will know that everything in college is an extension of what you learned in high school and before, which may be more helpful to understand the meaning of learning itself. If you are a person with a strong thirst for knowledge and a strong understanding of learning ability, as long as time permits, it is recommended to look at college textbooks and recall what you have learned from a higher angle, so that it is easier to enhance people's understanding ability. If you have a general thirst for knowledge and study only for a job, I suggest you mainly study your own things, but you can't spend too much time learning these things, otherwise the delay in the college entrance examination will not pay off. Science suggests looking at college physics, advanced mathematics, etc. In advance. It doesn't matter if you don't understand. As long as you know a concept and consciousness, you can expand your knowledge and improve your way of thinking.