In this Feb. 7, 2014 file photo, students Julian Lopez, second left, Ben Montalbano, second right and James Agostino, right, listen during their Advanced Placement (AP) Physics class at Woodrow Wilson High School in Washington. A new policy from the American Academy of Pediatrics recommends delaying classes for all teens until at least 8:30 a.m. to curb their widespread lack of sleep, which has been linked with poor health, bad grades, car crashes and other problems. The policy was published online Monday, Aug. 25, 2014, in Pediatrics. (AP Photo/Charles Dharapak, File)
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