AMM, 81 (1974) 490:
THE DERIVATIVE SONG
Words by Tom Lehrer -- Tune:  "There'll be Some Changes Made"

You take a function of x and you call it y,
Take any x-nought that you care to try,
You make a little change and call it delta x,
The corresponding change in y is what you find nex',
And then you take the quotient and now carefully
Send delta x to zero, and I think you'll see
That what the limit gives us, if our work all checks,