A song for use in helping students to recognize how a change in units affects the variance (since variance is expressed in squared units). Music & Lyrics by Tom Toce, ©2015 Retrograde Music. This song is part of an NSF-funded library of interactive songs that involved students creating responses to prompts that are then included in the lyrics (see www.causeweb.org/smiles for the interactive version of the song, a short reading covering the topic, and an assessment item).