[rootusrootus]

I went to a state university in Oregon...

> You could enrol for a course and only turn up for the exams

And aside from a few exceptions, this is exactly how I approached my studies. I'd show up on day 1, the day of each midterm, and the last day of class before the final exam.

[Spooky23]

I did this as well. I had to take “economic statistics”, as it was discovered late in my senior year that AP Stats couldn’t be used in my major.

I didn’t show up at all, as the class notes were available online and all assignments were online submission (on a VAX, of all things in 1999). When I arrived at the midterm, the professor called the UPD, as he had never seen me before.

[shard]

Back in college there was a class where all exams were take-home, and all homeworks and exams could be deposited in the professor's mailbox. I read the text, did homework with my classmates, passed the exams, and never even found out what the professor looked like.