A middle school teacher in southern Kentucky has been suspended pending an investigation into a controversial assignment.

The assignment involved middle school students dressing up as historical figures, and allegedly the teacher had given permission for one student to dress up as Nathan Bedford Forrest. Nathan Bedford Forrest was a General for the Confederate Army and the first grand wizard of the Ku Klux Klan.

The suspension comes after a student was recorded wearing a Ku Klux Klan costume on a school bus. According to Pulaski County Superintendent Patrick Richardson, one of the videos on the incident falsely identifies the teacher involved.

The school has launched its own investigation and will report the incident to the Educational Professional Standards Board.