text: I am a teacher and had the same question. It has been proven that teenagers get the best sleep from 2 am - 10 am. But then why do we start school so early?\n\nMy principal answered this question simply. Because there are after-school sports and clubs which rely on daylight for their practices. That seems like a pretty logical answer to me. I don't want to get up early, but now at least I understand why.