I wouldn’t consider that playing favourites. If a student is dishonest extremely often, then the teacher is more likely to see if their cheating on a test, on the other hand, if a student doesn’t have a history of cheating and still has perfect grades, then the teacher is less likely to check on them
defenestration means to yeet something out a window, and if the thing is the image of Mrs. Godfrey, I’d say it works pretty well