10 AM - some scientists think teenagers should start their school day., 7 HOURS - amount of most teenagers normally sleep for., 7 AM - This is the natural time for a child to wake up., 9 AM - This is the natural time for a teenager to wake up., MIDNIGHT - This is the natural time for a teenager to go to sleep., 6 AM - This is the time that American teenagers get to school. up to go, 9 HOURS - Teenagers need nine hours of sleep a night.,

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