One reason IIRC is that the daily physical cycle for most people shortens as we get older.
Another thing is that the travel times to get to school is quite long in suburban/rural locations. I remember one job I had that had a long commute and I would see kids waiting for the school bus at 7 AM.
Contrast that with my high school, that was a 15 minute walk and didn't start till 8:15. Much less stressful.
> I would see kids waiting for the school bus at 7 AM.
Brutal! Taking this to the extreme - I saw kids in the extremely rural Copper Canyon, Mexico, catching the twice-daily bus at 5am to get to school every day. Though, to be fair they all passed out within minutes, despite the bumpy roads and regular breakdowns. I would be ruined within a week if I had to do it.
Another thing is that the travel times to get to school is quite long in suburban/rural locations. I remember one job I had that had a long commute and I would see kids waiting for the school bus at 7 AM.
Contrast that with my high school, that was a 15 minute walk and didn't start till 8:15. Much less stressful.