The American Academy of Pediatrics recommends that teens aged 14 to 17 get 8.5 to 9.5 hours of sleep per night. In 2016, studies found that only 32 percent of American teens got eight hours of sleep on an average school night. Many were not getting the recommended amount of sleep each night. To solve this problem, the American Medical Association (AMA) recommended that middle schools and high schools delay their start times. The AMA believes that delaying school start times until 8:30 a.m. would help students get enough sleep.