Teenagers’ sleep tends to be less regular than the sleep of adults and young children. This means that the times when you go to bed on the weekend are not at all the same as on school nights. On weekends, you may go to bed much later. You may also wake up much later on the weekends. Late bedtimes on school nights makes it hard to get enough sleep. This is because you need to wake up early for school. You should aim for at least 8 hours of sleep on school nights.