the way I see it, school is a stupid, petty and ineffective system. This, of course, varies from school to school, course to course and at what level you are (elementary, highschool, university/college).
Lets take highschool as an example, since I am yet to attend college. The point, in most cases is not to learn. Nothing worth learning in any case. The point is to get through the system with as high marks as possible. The reason you are there (in most cases) is so you can get good grades, to get into a good university, to get a good job. So, the final objective is getting a good job. I could care less about Algebra and Physics, I am never going to need it. Why should I spend my time, my effort, my hard work, to learn something which will be useless to me in the future? Why, because the system says I should?