Our son found success at the University of Montana Western. They teach one class at a time. 18 days of one class! Class is 3 hours a day plus homework for a total of 6-8 hours/day. Then a long weekend and on to the next class. Even ADHD kids can take a 16 credit load successfully each semester. Check it out! We are glad that we did – he graduates next year, 2021. You could use 2020-2021 to get in-state residency (it takes a full 12 months!) which would make great use of a gap year, too!