What's in a word or two?

Firstly, the teacher should've known about the student anger management problems and history of violent and aggressive behaviour. Secondly, as much as many teachers have policies around being late for tests, some students are still late, and we as future teachers are going to have to deal with that. If I had a student tell me to F*** off, and walked away I would be shocked more than anything. I probably also would've notified the VP and hopefully he/she would take care of the situation. What the student did was straight out wrong and disrespectful, and if it happened a second time, I'm positive there would be major consequences. I don't think that it would be right for me to punish the student. I feel in that situation the teacher has to be the bigger person and not 'fall into the ring.' I would save it for the VP or principal to deal with and make sure the parents are notified about the students behaviour. Overall, this behaviour is not acceptible.