I've always heard teenagers need more sleep than younger kids. I've never actually verified this claim.

In my area it's the opposite, and the reason is simple: high schoolers don't need childcare.

> School is off in hot summer and cold winter, I would prefer they study on campus then, so they can enjoy longer break in spring and fall, where outdoor weather is much better to get around.

That's a pure anachronism, but switching costs are genuinely high so not totally irrational.