This tosses in a whole other layer of stress and meta-game managing the relationship with the teacher. I do not do anywhere close to my best work with someone

This tosses in a whole other layer of stress and meta-game managing the relationship with the teacher. I do not do anywhere close to my best work with someone staring at my every move. For undergrad, I'm much more in favor of deliverable-based approaches. Term projects, problem sets, etc. I think it's cruel to boil such a high-stakes decision to a single-point-of-failure event like a big test. I've heard too many stories where someone had a bad event happen before a test, or just slept poorly, or made a trivial mistake, or got sick, only to be told "too bad". If cheating is a huge problem, locking down the final step isn't going to fix anything in the long run. It destroys all trust. We need to take a look at the motivations to cheat, even if these reasons are uncomfortable.