Cola, I'm going to venture to guess that your little guy is a lot like my DD. That said, "I understand that you would prefer something else, but I have a very good reason for asking you to do it this way-- you just aren't in a position to understand that reason very well at the moment," probably has to come from someone who has demonstrated responsible, honest, mature conduct over a long period of time, and who has proven him/herself to be worthy of trust.

He's clearly across the Rubicon with his teacher-- I doubt that there is a convincing reason that he'd believe with that individual at this point in time. I've seen this with my own DD. Once she loses respect for an authority figure, it's gone, and so is her conscientious compliance with that authority figure.





Schrödinger's cat walks into a bar. And doesn't.