Exams are not proctored. They are usually take home. It is up to the student to honor the rules of the test, such as time constraints and whether it is open or closed book.

This has interesting results. It turns the students and professors into collaborators rather than adversaries, it's simply a much nicer atmosphere.

It's so easy to cheat that there's no status for it. In fact, if you're going to cheat, you'd better be damn sure your fellow students don't find out about it, because they'll ostracize you. The students like the honor system, and they're not going to tolerate anyone undermining it.

Also, students often simply left their dorm rooms open. In my four years there, I never heard of any incidents of students stealing. Not once. It was pretty obvious that the students simply would not tolerate other students stealing. Policy was that the campus security was not allowed in the dorms unless invited by the students.

I hope that gives some idea of how it worked.