No it’s Biological Science.Teenagers have a different circadian rhythm signalling them to stay up and sleep later than younger or older people.If we swapped when we were sending them to school to 9:00 and the young kids to 7:00 rather than backwards like it is now, it would solve a lot of issues. …but the schedule is for the convenience of the teachers, not the students. The older kids are more likely to have after school activities, and the teachers don’t like staying late, so they start school earlier.