Well, I have 100% cooperation from the parents. They are on board with separating her as a learning tool, not a punishment and upon their request I'll bring her into the group for short periods where I'm free to be there on the floor with 100% of my attention and use positive enforcement. If she does 5 minutes without hurting anyone she gets congratulated and a sticker....and we'll gradually increase the time. I feel good about this...
The reality is that I cannot have my eyes on her 100% of the time if she's always in the group. There are periods of the day, like in the morning while I'm preparing my kids' school lunches and this is one of her worst times, since she knows I'm preoccupied. So, if she's separate, she can't hurt anyone. I think this is a way to solve my immediate problem and also long-term....here's hoping!