When I first taught the quadratic formula I would make students memorize it. The problem was that only about 50% of my students would remember it for the test. Then a teacher, Josh Severin, sang the quadratic formula to the tune of “Pop Goes the Weasel” and I knew that I would have no problems with students memorizing this again. In fact it has worked better than I could have possibly imagined. 100% of my students can memorize the formula now. Mostly because listening to me sing it is such a traumatic experience. Here are the words . . . X equals negative “b” plus or minus the square root of “b” squared minus four “a” “c” all over two “a”. Not that memorizing the formula is as important as deriving the formula, but it is a nice thing to have memorized for those college entrance exams. The video of my singing is below. Listen at your own risk.