I have to laugh because it's funny how easily things can be misread....I was agreeing with you. When I said I love that you said separation doesn't teach, I meant it which is what I went on to say. Negative reinforcement can be an effective way of teaching consequences for inappropriate behaviour, in some cases depending on the child and their level of comprehension. I went on to agree that in order for the child to learn what is acceptable they have to be taught which is exactly what I said. Hence why I go on to comment about being able to give the child enough one on one to achieve this without it costing the other children something, especially after the OP said they had already been working so hard for the last 6 mths without success. Sorry if it wasn't clear but I was absolutely agreeing with you.