According to this link the teacher is not on leave: http://www.thestate.com/news/local/article42069354.htmlThey're probably just on paid leave until the various investigations are cleared up. That's usually how these thing are handled. They will be cleared of any wrongdoing and sent back to class.
Roof also said a substitute teacher is currently teaching the math class where, on Monday, Fields was filmed forcefully pulling a female student from her desk and tossing her to the floor after being called in response to a discipline issue. The regular teacher, who was present for the incident, is not on leave, Roof said, without elaborating.
That can mean anything from he has to report to work, but is not teaching in that classroom to he has said take this job and shove it, but he is not on leave.
I cannot find one article that says the teacher is on leave, just ones saying the VP is and that there is a substitute in the classroom.