[Blackpill] The reason girls do better on average academically is easier access to sex and relationships.
Water is wet.
Sex is a basic biological need, and it's healthy for the human mind to have sex. Without sex, your mind isn't getting the proper sexual and emotional desires fulfilled. This causes a lot of stress. If you look at the best of the best in academics, the males dominate. However, when you look at averages, females dominate. The reason is because any female can get sex or a boyfriend but men in the bottom 50% will struggle immensely to get any sex at all. This demotivates them because they're not getting positive reinforcement. Not only that, but men have to put great strategy into trying to get laid, while girls just have to choose the best cock thrown at them. These means girls can focus on only school and get laid, while men have to focus on both school and sexual strategy. Plus for a lot of men their sexual strategy will often result in rejection and will therefore result in frustration, making it harder to focus on school.
There's other reasons girls do good in school, such as the whole system being geared towards them, but the easy access to sex makes it easier to succeed.