A high school teacher who slapped a student's head during a tussle over a pen has been censured by the Teachers Council.
The science teacher - who, along with the school and student, was not named by the council's disciplinary tribunal - said he acted instinctively after losing an eye during a traumatic incident when he was younger.
The tribunal heard two students involved in the tussle had their hands grasped around a red pen, which they were pulling on.
The teacher, who was crouched down at the time, saw the pen's ink ball pointing towards his face and coming towards him rapidly.
He instinctively stood up, struck the student over the back of his head with an open hand, and said something like, "If you do that again, I will give you another one."