Recent research verifies that when looking at small differences in student ratings, faculty and administrators (in this case, department chairs) draw unwarranted conclusions. That’s a problem when ratings are used in decision-making processes regarding hiring, reappointment, tenure, promotion, merit increases, and teaching awards. It’s another chapter in the long, sad story of how research on student ratings has yet to be implemented in practice at most places, but that’s a book, not a blog post. Here, my goal is to offer some reminders and suggestions for when we look at our own ratings.