research teens and sleephabits

Research shows that teens need 8½ to more than 9 hours of sleep a night. You don't need to be a math whiz to figure out that if you wake up for school at 6:00 AM, you'd have to go to bed at 9:00 PM to reach the 9-hour mark. Studies have found that many teens, like Garrett, have trouble falling asleep that early, though. It's not because they don't want to sleep. It's because their brains naturally work on later schedules and aren't ready for bed.I coped from google.