That Learning Method Is Certainly Divisive

(We are learning how to find out if a number Is divisible by another number. For instance, if a number is even, it is divisible by two. In this particular instance, we are learning the trick for 3’s. If a number’s digits add up to a number divisible by 3, then it too is divisible by three. For instance, 225. 2+2+5=9 and 9/3=3. Therefore, the following happens.)

Teacher: “To remember the trick for threes, just remember: threesome! Threesome! Threesome!”

(Of course, nobody understood the implication at the time, but I still wonder if she was doing it intentionally or just out of naïveté.)