I really, really tried to do that as a teen. I watched little or no tv anyway do that was easy and this was before the smart phone era so that wasn't an issue either. I would go to bed and lay in bed wide awake for hours, finally fall asleep, wake up, hit snooze seven times and drag in to class 20 minutes late. Looking back I honestly think I would have done much better in school and maybe even made it through college if I could have shifted my sleep schedule a few hours. I also firmly believe that that's really no one's problem but mine, so I'm not complaining, but my anecdotal experience suggests to me that some kids really would do better with later schedules a opposed to earlier bedtimes.