This is what my high school did and it worked great. That extra hour of sleep in the morning as a high-schooler was crucial to me getting 7-8 hours a night. It

This is what my high school did and it worked great. That extra hour of sleep in the morning as a high-schooler was crucial to me getting 7-8 hours a night. It's better for students and for parents. You just need to have adequate afterschool programs for grade school kids until their parents get off work.