Senior Hazel Ostrowski attends her first-period AP statistics class at a Seattle high school Wednesday. Ostrowski was among a group of students who wore activity monitors to measure how long they slept. A later start to the schoolday helped Ostrowski, who said she doesn’t struggle to pay attention as much as she used to.
(AP photo/Elaine Thompson)
Later school start times giving students more sleep in Seattle : 1 / 1