what's the matter with my daughter?

i can understand your worry. but dear don't give too much importance to this. children at this age are bound to behave very rudely as tghey think they know everthing right. they never love being instructed and the dos and donts are terrible for the. being old and wise, i would suggest you to cool down a bit, let go and just IGNORE her. pls donot give importance to her inane stuff, as long as she doesn't hurt, steal or lie. let her do things her way, don't complain to every person dropping in, donot make issue. if she doen't want to listen, let go, in turn donot listen to her. having said this, keep track of her movements inside and out at school and make sure to praise her infront of others whenever she does something commendable, be it as little as tidying up her room or finishing off her food in time. thank you

she is growing up i presume... or could it be possible that she has bad friends??? try to talk with her, to find out the problem!