> why the youngest ended up getting up the earliest puzzles me. I think there's been quite a few studies indicating that teenagers benefit the most from later

> why the youngest ended up getting up the earliest puzzles me. I think there's been quite a few studies indicating that teenagers benefit the most from later start times due to the shift in their internal clock. Little kids can deal with earlier start times. Staggered start is frequently due to logistics; they don't want to pay for a larger fleet of school buses and drivers to facilitate the schools starting at the same time.