At least in middle school, children's school performance is not the most important at this stage. About 80 points are often good students in the future, because at this stage, their extracurricular absorption ability is getting stronger and stronger, and their sexual interest is getting higher and higher, while children with more than 90 points often become poor students in junior high school. It is because he has repeatedly studied primary school knowledge for six years and is too weak in other aspects.