Upper Darby High School students Rayan Hansali, from left, Tanveer Kaur, Elise Olmstead, Fatima Afrani, Joey Ngo and Ata Ollah, talk in the campus courtyard, Wednesday, April 12, 2023, in Drexel Hill, Pa. For some schools, the pandemic allowed experimentation to try new schedules. Large school systems including Denver, Philadelphia and Anchorage, Alaska, have been looking into later start times. (AP Photo/Matt Slocum)
