Sleep is vital to your well-being; as important as the air you breathe, the water you drink and the food you eat.Teens need about 8-10 hours of sleep each night to function at their best. Most teens do not get enough sleep. In fact, one study found that only 15 percent reported sleeping 8.5 hours on school nights. Teens' lives are busier than ever. Not getting enough sleep or having sleep difficulties can limit their ability to learn, listen, concentrate and solve problems. Katherine M. Keyes, PhD, discusses teen sleep deprivation and what you can do to help your teen get the most beneficial sleep they so badly need.