Several years ago, Jodi McClay, assistant superintendent of the school district in Temecula, Calif., started fielding a bizarre complaint from parents and students. It was too hard, they said, for teens to rise in time for homeroom. Initially, she was puzzled. Classes started at 7:30 a.m. The solution seemed simple: go to bed earlier.
That's when McClay learned about sleep phase delay, the medical term for how puberty affects bedtime. As hormones change, so do circadian rhythms, making it biologically unfeasible for some teens to go to bed before 11 p.m. and wake up before 8 a.m.--let alone get dressed, transported and ready to learn.
Concerned, McClay met with a group of parents, teachers and administrators to discuss a question that doctors have been posing for years, lately with growing…