加州 推迟中学 每天上学时间

http://www.cnn.com/2019/10/14/health/california-later-school-start-times-
trnd/index.html

Gov. Gavin Newsom signed legislation on Sunday that pushes school start
times later. Under the new law, middle schools will start classes at 8 a.m. or after, while high schools will start classes at 8:30 a.m. or after.
Optional early classes will still be allowed.