Originally Posted by JonLaw
I vote for apologizing because that's probably the only key that works for this particular lock.

I'm with JonLaw on this one. It is a good lesson to learn which types of locks you are dealing with, as well. You can discuss with your son that all people deal with situations differently and that for the most part he shouldn't correct an authority figure in public. I think it is good to let your son know that he was right to take responsibility for his actions and apologize, and that even if you happen to agree with him about the further commentary, it is best to take responsibility and say no further. Especially with this teacher.