Just to throw my two cents in...I actually agree with all points here except for the teacher blowing up on the student but like someone said this might have been an exaggeration told in part by the student got got blown up on....or it could entirely be true, so who knows..
One thing to note is that this was a 7th grader....a 7th GRADER!! I remember being that young and I can tell you what, 7th graders are obnoxious little brats. Not only that but they are going through puberty and starting to get that mentality that they are invincible and know everything.
I think antiphon should just be lucky they didn't have corporal punishment for he would have otherwise been telling different story...like how he got his rear end handed to him for speaking up.