The first time I taught a large class (about 600 students in Calc II), I was totally unprepared for how much effort it took to simply run an exam, from room scheduling and proctoring to dealing with conflict exams (and conflict-conflicts and even conflict-conflict-conflicts). Then came grading, and re-grading, and student complaints about unfair TA grading. And all this doesn’t even include actually writing the exam!
Now we are using fully-automated exams in the CBTF (Computer-Based Testing Facility), which is providing more authentic tests with dramatically improved logistics, as described below.
Education at Scale 