I just handed in grades for one of my classes. Not 20 minutes later, I got an email from a student asking why I couldn't give her a "B" because she "tried really hard and worked harder than most of the class". She's let me know repeatedly that she "really needs a "B". I considered sending her this cartoon:
But that would be wrong. Funny, maybe. Satisfying, definitely. But definitely wrong.
HT: Marginal Revolution.