Originally Posted by CFK
After finishing the usual highschool sequence, my son took the undergraduate math courses at the university, but as a highschool student. When he matriculated and started as a freshman at his current university he started taking graduate level courses. He has never had to repeat anything. He has also self studied topics and has been allowed to skip taking the courses formally by showing mastery through discussions with the professors and, in two instances, taking the course final exams. ( didn't receive credit, just was able to waive them as prerequisites to higher level courses)

What (kind of) universities were these where could take undergrad during high school and grad during undergrad? Do you think you were very lucky to have no forced repetition and to get credit for courses taken, or do you think this is to be expected?