Before March 2020, I believed firmly that frequent, in-class quizzes were a way to ensure students had prepared for class and had some understanding of the material. In fact, I was notorious for pop quizzes, although I did make it a practice of dropping the lowest quiz scores. During my decades teaching, I never really questioned the efficacy of quizzes—not until that one day in March 2020, a day that helped me change my teaching practices for the better.