We've had two of our Obedience/Canine Citizen classes thus far.

Yay = we didn't eat faces off and were perfect in the + dogs environment

Boo = We are SO happy there that we can't stop barking!

AHHH..STOP..BARKING.

The only thing I can do to get her to stop is cover her eyes. If she can't see it, she pretty much bails on the vocals.
Any other suggestions?
The trainer said maybe give her a gaggle here and there, but that isn't an immediate correction. Sometimes I think she may not be bothered by a finger boinked in the mouth because she likes her teeth brushings and relates it to nothing more than that.
I can get a hand over the eyes pretty quick though.

Over all though, we are having fun and she is going to LOVE fly ball if she is so in love with the environment we go to every Monday.
It is obvious.