A 5th grade teacher returned from dental surgery to find her students had "orchestrated a mock slave auction" and put it all on video, according to NJ.com.
The incident at a Maplewood, New Jersey school, supervised by a substitute teacher, has parents understandably furious.
"There was a sale of a black child by white children in the classroom," one parent told CBS New York. "If you're demoralized—sold on a block in 2017—it may affect you the rest of your life."
"I'm disgusted, really disgusted a child was bought," said another. "That doesn't make any sense."
The students were in the midst of their "colonization unit" but the reenactment of a slave auction was decidedly not part of the curriculum. Upon returning to class, the students' regular teacher promptly sent a letter home to parents.