She is 7, so let's not call her a little psychopath just yet. OP, is it possible to talk to the mom and be honest that there has been some issues in the past and you would like to discuss things ahead of time before the girl is allowed in? You say she is nice, but I think if you talk to her you can get a better feel of how she sees her DD. There may be issues you don't know about (issues in the home that are causing her to act out for example). I think she should be given a chance, because if people are willing to write her off at 7 and not give her a chance to learn and grow, then she is going to be a lost cause. And I am really steamed that the teacher would say things about her to you. My DD was absolutely harassed by a mean girl in 2nd grade..this girl was just downright nasty and so was her mom. When I brought it up to the teacher, she worded it very carefully (their personalities do not mesh) without disparaging the child, which to me is the correct way to handle these things. It sounds to me like the little girl in the OP is being written off by everyone, which will only make her act out more because she wants someone to pay attention to her. I do understand as I was a coach for girls soccer for numerous years and dealt with cliquey behavior, bullies, criers, whiners...as much as we would love these groups to be harmonious sometimes they aren't and as a leader, we need to teach all these personalities how to work together...after all it is no different when they are in the real world as adults.