It is a fact that teenagers need 9.25 hours of sleep for optimal performance. According to the National Sleep Foundation, "15% of teens are only getting 8.5 hours" per night, which is insufficient.
Lack of sleep contributes to your teenager's academic performance, attitude, mood and inability to drive.
One reason why teenagers have trouble sleeping, aside from stress, is cell phone calls and text messaging received from their friends throughout the night.
Ensure that your teenager has the same sleep/wake patterns through the week as on the weekend. Talk to your teenager about what is causing him/her stress and lack of sleep, and turn his/her cell phone completely off during the night.