According to the National Sleep Foundation, most teens aren’t getting the sleep they need to perform at their highest levels. The organization’s website says that teens need about 9 1/4 hours of sleep each night to function best (for some, 8 1/2 hours is enough). However, one study found that only 15% reported sleeping 8 1/2 hours on school nights. Getting the proper amount of sleep can not only help you concentrate, listen and learn better in school, but it can also make a difference in your stress level. It’s also important to develop a routine sleep schedule.