If I was a teacher, I would say 'no one gets out of here win an A unless we all get an A - if your friend is not doing so well and you're doing OK, you stop and help that person.' You work as a group, not a group of individuals. You might think it's every man for himself in the world, so we must make it like that at school, but until we figure out that we can't go on like that, that we must collaborate to solve what is now a world-wise issue, we better start in schools.