My school had us memorize a "rap" on the quadratic formula to the tune of does your chain hang low.
Does 2a hang low,
under negative b,
plus or minus square root,
b squared minus 4ac,
if you practice that quadratic you will know it automatic,
does 2a hang low
My high school teacher taught us one that went to the music of Pop Goes the Weasel. I've caught myself several times singing it to myself in my head while in my college Precalculus class.