The reason your school does not have one just may be due to the fact that you either go to a shithole of an institution or kids there are far busy doing nothing trying to make it big in the world. Have you even realized just about now that some of the best web ideas have been taken up? My two cents, take an idea, spruce it up and dominate the market. Unless you have a real unique idea that will have the world in fucking awe, id bet my bottom dollar that you would do much better with a basic adsense account. But thats just me, I could be wrong.