In my Algebra 2 class, we learned the quadratic formula to the tune of "Gillligan's Island":
Negative B plus or minus
The square root of
B-squared minus 4ac
All over 2a
All over 2a
Other people claimed to have learned the handy formula by singing it to the tune of:
Frère Jacques
Pop Goes the Weasel
Row, Row, Row Your Boat
God Rest Ye Merry Gentlemen
Notre Dame Fight Song
U of M Fight Song
Jingle Bells
Ballin' the Jack
Amazing Grace