Learning is the most important thing that we should do in school. School is a place where we can find out what we don't know . Our parents send us to school because they want us to be smart or even smarter than them.
The other thing that we should do in school is socializing or find a new friend. In school we should keep the school clean, we must help each other if they need help. In school, we also learn how to be in an organization for example student council, english club, scouts, etc.
with long reason, huh? :) hope it can help you ;D