Ishouldbeironing
I'm a teacher and a parent.
My advice to you would be to approach this meeting with an open mind. Your natural inclination is to side with your daughter. However, as you will be aware, there are two sides to every story and frequently the teacher will see the side of a child that many parents are either not aware of or do not want to be aware of. Unfortunately, kids (regardless of academic ability, social class etc) are a totally different 'ball game' in a class of 30 others, away from their parents and amongst their friends learning subjects that they may not be particularly interested in.
I have also been depicted in the way that your child has depicted their teacher. Quite frankly, the vast majority of teachers do not have the time or the inclination to be picking on kids etc. There is so much to get through in a lesson that taking time out to focus on one child in this way is nigh on impossible. (Remember that many teachers have difficulty finding the time to get to the toilet or eat their lunch during the day, such are the pressures on their time)
I have listened diplomatically to parents on the phone telling me how their child is being 'picked on' by me whilst at the same time remembering the volleys of verbal abuse, chair kicking and tantrums that I have had to endure from their child. (Not saying that your child's behaviour is in anyway comparable here!)
The fact that the school are contacting you indicates that they are being pro active about something that they see as an issue. This is a good thing. If they hadn't picked up on this issue, then you would have more cause for concern.
My instinct on this one? Your daughter may be under pressure from the others in her class because of the good grades she is achieving and her work on the Pupil Council. Some high ability pupils will go through stages of trying to fit in with the rest of their class - hence the swearing and having issues with teachers. I may be wrong, but I have seen this on a number of occasions.
Hope this helps and good luck with your meeting.