Every June for two decades, I have spent a week grading papers for the Educational Testing Service’s Advanced Placement Program. In English Literature, there are 1,125 high school teachers and college professors who are — at this very minute — grading 275,000 AP exams.

We began at 8:30 a.m. Friday, and will end at about 5 p.m. Thursday. That’s seven full days, with no weekend. Yet we love (almost) every minute of it.