If you're noticed, a lot of girls in schools are really dumb. The ones that want guys to like them don't bother studying or just act stupid. Look at Paris Hilton and Jessica Simpson (she acts stupid though). Then theres the ones that are just stupid and try and act cute. Then we have the feminists that think they're better than the guys when they're not and shit cuz they're like the former. And then we have the really smart asian/russian girls that are disciplined, but hate having to study.
I think it's the fact that back in the olden days, girls didn't get educated, and the ones that did proved that they could be educated and hence were very smart.
Boys on the other hand could get an education, but refused it.
Anyway, these days, we have those sporty boys that are kind of ignorant and arrigant. Then dumb nerds, the ravers (who don't know shit but say they do to get you down), the self absorbed bunch and those smart stuck up people. And the best are the quiet types that are smart xD Theyre usually picked on though.