My eldest daughter did this and still does all though she's been acting up for her teacher!!!! It was her hormones. She's now 13 but her behaviour changed around the age of 9. We also noticed that her body was changing.

Like SMSJS said you need to stand up to her but also provide an explanation. A counsellor will def help. If it's her hormones ypu can give her Evening Primrose Oil, which really helps.

I'm at the point where I tell my daughter to turn down the bitch switch! In other words, think about why you are acting out and take control of herself. We explained it to her before we used the term. So she knows exactly, what we are talking about and generally she stops being a bitch and behaves like the daughter we know she is. If that makes sense.

I hope this helps!

Cheers Raven

My eldest daughter is similar to this, and has been doing this since she first began going to school.

With my case, it seems that my daughter is acting up at home, simply because she can get away with it a little more than out socially. My suggestion to you, bear with it and slowly work on her to help her realize what she is doing. Taking her off to a  councilor who specializes in children will also help somewhat. Don't offer your daughter the opportunity to go, simply make an appointment and take her.

My daughter is slowly improving (although it has taken her around 9 years to begin altering her behavior), and is really starting to learn to control herself.

I think it is all about controlling her environment. Outside the home, too many factors keep her fro being in total control, and her public image is so very important to her. At home, behind closed doors she is a real cow. I think this is what the modern kids do to feel empowered, it is a behavior that needs to discouraged. Try my suggestion above, also when your daughter does this at home, simply instruct her to go to her room for 30 minutes to an hour to think about how she spoke to you. Make sure you have her leave all phones and any other outside communication device with you until her time out is completed. If attitudes continue, maybe use the old fashioned...make them work, provide distraction therapy. Create a swag of simple chores to keep her busy. Being busy, she will have no time to argue with you.

Anyhow, these are a few ideas to think about.......Good luck!