Chloe Harris (pictured) says she recorded video of the Dover High School incident because she wasn’t sure anyone would believe what happened in class.

A teacher in Dover, New Hampshire has been suspended after a video began circulating online showing students singing a song set to "Jingle Bells" with lyrics including, "KKK, KKK, let's kill all the blacks."

The assignment, in an 11th grade U.S. history class, was to change the lyrics to a Christmas jingle to tell a story about Reconstruction, the period after the Civil War.

Two of the students in the class chose the KKK as their topic and altered the lyrics to "Jingle Bells," using phrases like grand wizards and burning crosses.