Everyone fights over marks. No one will let you sit near them because they don't want you to learn as much as them.
People will discourage you from coming to class. They also do other sneaky things such as hide your laptop, set your locker on fire, lock you in the bathroom during tests, etc.
After every test mark comes back, everybody asks everybody what they got and if anyone gets a higher mark than them, they get a swift kick in the groin.
Even if you got a lower mark than the person asking, you might still get a kick in the groin. If they can stop you from having kids, then they are more successful than you.