When I taught one year I was in a "portable" classroom and there was another classrom on the other side of a very thin wall. (The wall was meant to be movable if you wanted to combine classes, though we never did). The other classroom was a 4th grade and the teacher there was one of the favorites at the school. She had been there awhile and was very nice & friendly to everyone. But, that teacher definitely shouted a lot and sometimes had that disgusted tone to her voice. Even if she wasn't saying anything that bad, she sounded like she was talking to someone who disgusted her. It was so sad. Sometimes my students would hear her through the wall and look at me for an explanation. I never could figure out the right thing to say! The teacher would say things like "SHUT your MOUTH".
I wish I had at least tried to talk to the principal about it, but I'm pretty sure nothing would have happened. Everyone LOVED her. And the principal was all about being strict. She once said she wanted my kids to be "well, not like robots, but like that." Um, they were 6 years old!
Anyway, I know there are bad teachers out there and it is scary to think how much power they have while no other adults are around. I wish every classroom had two teachers or at least one teacher and one aide. Maybe an "open door" policy where the principal would be walking by?