B., I am not an expert but I have raised two daughters and was a substitute teacher in their middle and high school. To be honest these are the beginning of some very hard years. I found when I worked at the middle school these were the worse kids when it came to being mouthy and disrespectful. Most of this is because they are trying to find themselves. Their in this point of their lives where they just don't know where or how to "fit in". Some girls esp those that don't make the perfect grades, have the perfect look are fighting a constant battle to fit in. To me the kids that did the best were thoese that had other activities in school such as band, sports or even yearbook. These kids found their place where they could be themselves and make friends within those groups. My oldest daughter went through this but when she signed up for basketball and realized she was good at it alot of the problems stopped. My yougest was always in band and guard, it gave her the self esteem she needed and to be honest other than the occasional rolling of the eyes she never had much of these problems. The other advice I will give you is you need to sit her down and have an ADULT conversation with her, that means not losing your temper, staying as calm as possible because trust me she will fight you on this, she does not want to hear what you are going to say. Explain to her you understand what she is going through. Keep in mind that school is even harder than it was when you were there, kids are more stressed than ever. Also tell her you want her to talk to you about the way she feels but at the same time explain to her that even though you will be there for her and open to listen (even to things you may not want to hear) that you will not allow her to be disrespectful to you, her other elders or her teachers and if she continues there will be dyer consequences (spelling??? YIKES!)such as loosing priveledges, going to friends, playing any video games, tv, phone (oh the phone that's a big one esp for girls) or other things she may enjoy will be gone. You as a mom can be a friend to her with an ear to listen to but you have a much harder job, you have to be a mom which means setting the limits (that we all hate to do)and most of all following through with those limits. Get a handle on it now before things get worse because I have seen so many good kids headed the wrong way and when parents don't get a handle on it, it just gets worse. Also be supportive, if she is in extra activities GO to them perticipate. I don't know if you work outside the home, I have other than my 2 years as a sub. I know it can be hard to be there but it is harder not to be. Being a mom as you know can be the hardest job of all but when your kids are grown you will look back on these days and actually miss them. You know the saying they grow up so fast it's true they do and the decisions you make today will be with you and most of all her the rest of your lives. Good luck and let me hear from you.