This is a 30-second video of the song I use to help my students remember the quadratic formula. I believe the song credits belong to John "The Truth" Knuth, who student-taught at my high school in California about 25 years ago.
This song is sung to the tune of "Jingle Bells," not "Pop Goes the Weasel."
I'm not sure if you can read the lyrics on the thumbnail, but you may download the preview for "Quadratic Formula 2012" to see the lyrics there.
This is a freebie, as I have a related product ("Quadratic Formula 2012") which you can hopefully find listed alphabetically right next to this one!