This is a good case for children learning manners, as SRS says, from their parents. If they know what is correct then the teacher's usage should not be a problem, though I wouldn't care for her use of it, either.

I've always used you guys until I had a wonderful professor from Africa point out to me that I was excluding all members of the same sex as myself, so I swtiched to you folks. Of course, all bets are off at Mudcat where some of us like to hone our skills at writing in the venacular!

There are always going to be elements in our children's lives which don't meet our standards. All we can do is teach them what we feel if proper and know that it usually sticks.:-)

kat