Nobody likes a pop quiz…or at least, nobody likes to fail a pop quiz. If you have students who habitually ace pop quizzes, well then, the words, "Put your books under your desk—we’re having a pop quiz," may be among their favorites in the English language. Most of the time, though? You’ll get a chorus of groans. So what’s the deal? Are pop quizzes perfectly fair and efficient ways to assess student learning, or are they a mean-spirited "gotcha" tactic designed to punish students who may not have finished their homework?