You might be trying to catch up on sleep. Sleep scientists say some children need only nine hours of sleep at night, while others need as much as 11 hours. It depends on the person.
Teenagers aren't just lazy. Their sleep hormones aren't calibrated to let them get up and go until later in the morning – which has academic and health consequences when school starts too early.
Sleep deprivation in teenagers as a result of early morning school starts has been a topic of much debate. There's more to this issue than just laziness.