A teacher/owner who is unaware of the way kids are treating one another is a big, big problem in my book. I'm not saying that a teacher is wholly responsible, because sometimes kids are sneaky and mean to one another. But I'm guessing many of these comments are taking place within the classroom because of the context of them. That's a culture of bullying.

Yes, I suspect something like K-12 would be very useful in your situation!

Kriston