The student refused twice to go to a school head so Mr Simpson grabbed him by the shirt between the shoulder blades and carried him out.
"He picked the student up from his seat. His feet could not touch the ground. He was struggling against Mr Simpson and his legs were flailing in a bicycle motion," the summary of facts said. "He eventually put (student) down on his feet and guided him firmly into the room. Mr Simpson was concerned that the student would run away if unrestrained."
The student apologised and was removed from any of Mr Simpson's classes. Mr Simpson resigned while the school was completing its investigation into the accident.
In a letter to the school, Mr Simpson admitted he had "crossed the divide of being a good teacher and should not have taken the action he did".
Costs are to be decided at a later date.