While I wholeheartedly agree that school schedules in the US are awful, take the American Academy of Pediatrics with a grain of salt. They can sometimes be pathetically out of touch with the real world.
They say that teens should limit all screen time to 2 hours or less a day. This includes class time and research and smartphone use, not just vegging out to Netflix.
Another example is their recommendations for car seats. I'll harp on this because a lot of redditers are or will be parents of small kids in the next 5-ish years and it needs more explanation because, unlike the previous example, this one sounds good at first. Every few years AAP declares increasing strict standards as "needed" because of impressive sounding percentages like a 75% increase. What goes unaddressed is the fact that car seats are already really, really safe (when used as directed for small children) and 75% better than a tiny number isn't actually a substantial gain. This is especially true when these tiny gains get negated by going to a smaller or marginally less safe car.
Statistics abuse aside, they also make inane recommendations like: kids 2 and under need to be rear facing. Most 2 year old have these things called legs which prevent this from being practical. Or: imagine telling a 6th grader they have to stay in a booster seat to comply with "Most children will need a booster seat until they have reached 4 feet 9 inches tall and are between 8 and 12 years old. Children should ride in the rear of a vehicle until they are 13 years old." source: AAP Updates Recommendation on Car Seats
Other evidence shows that many kid auto deaths come from parents using car seats incorrectly, which makes them far less safe than if they'd just used a regular seat belt. And with (nearly half of kid's car seats installed incorrectly)[http://www.usatoday.com/story/money/cars/2015/07/09/kid-car-seats-installed/29916055/] isn't this the real problem?
But wait, there's more. While the population has skyrocketed, the number of kids killed in car crashes has gone down 20 of the last 22 years. And that's the number of kids which means the gains are even outpacing population growth.