Try talk to her not to scream, why and what happen if you scream. You must let her know the reason why she shouldn't do this and that. Don't beat or scold the kids, that's not the way to discipline them. You know the way she behave like that is because she need attention from the parents or people around her. Talk to her nicely and you must be patient to explain to her. Give her a big hug. She will not change straight away but will slowly feel that you all are caring about her. I don't know how bad the situation but this is the only things I can share with you from your post...hopefully it will help

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