M.L.
I'd let it go. It is a new year. I promise the other teachers are probably seeing way more than you are. They are there day in and day out. While I can understand trying to keep parents happy, I do think it was wrong of him to disclose any problems he was having with her. This makes me question the school as a whole, and not just the teacher. If it were me, and a principal were being so irresponsibly "gossipy" with me about a teacher, I would be looking to transfer schools. If he cannot control himself, how can he control his teachers? Good luck!