Grade six and senior high school are two very important stages for a student. However, because parents have different ideas from yours, mom and dad hope that you will get a higher and bigger stage through knowledge in the future, and they are also worried that your self-control ability is weak and you will suffer losses in knowledge in the future.
As long as you can sit down with your parents and calmly talk about your real thoughts, let them know that you don't have to open your eyes to read school books. In fact, some extra-curricular books are very helpful to a person's growth, which can draw inferences from others and let them know that you are not "astray" in reading, so the most important thing is to keep your academic performance in a good situation.