Many students fail to read the assigned material before class. A failure to read is detrimental to both student learning and course engagement. This paper considers the often-neglected teaching technique of giving frequent quizzes on the reading. Drawing on the author's experiences assigning reading quizzes, together with student opinions about the quizzes solicited in end-of-semester surveys, this paper suggests that quizzing students on the reading has much to recommend it, and that common reservations about the practice are unfounded.