Everybody should know how early school starts, too early. We've probably all experienced wanting to fall asleep in class, so why should't we be able to? Kids should be able to take naps during lessons. Example if your teacher is teaching about fraction (bleh) you should be able to sleep and not have to listen to the useless stuff. Or you stayed up till 1:00 and can barely focus now, we should be able to catch up on sleep! WHOS WITH ME!
Whether you sleep in the class or not, it's habit-forming. You sleep in class one day, you sleep in class everyday. Biologically it's bad for a kid. If you are a parent, you wouldn't want to make your kid a night owl, would you?