I hope the ACT/SAT get with the program. Have a teen who just took the SAT and had to be there before 7:45. On a Saturday, so no good reason for such an early start time. Give them until at least 9!
My high school offered the SAT during a normal school day, which seems much nicer that having to do it early Saturday morning! (And means the teachers can double as proctors.)
Surely the good reason for the early start on a Saturday, is that all the adults running the exam can finish everything quickly enough to still have a restful weekend.
If I were an adult running an exam on a Saturday I'd be sad if it started any time before 9-10am. It isn't just teenagers who despise waking early or who have night owl aligned chronotypes.
Isn't it their job that they get compensated for? If I am not completely off, if this is a paid job (most likely with overtime and extra for weekend), then they have absolutely no reason to do that early.