I have an 11yr old defiant daughter. This has been going on for about 2 years. She continually lies to our faces, to her teachers and her friends. She has forged my name on school work, until the teacher finally caught on. She has stolen another student's shirt from school that was for a project because she did not like her shirt. She doesn't do certain school work. And many times lies about doing it. She will not do the one and only chore she has at home (feed dog). When she is grounded she goes behind our back to do the things she shouldn't be doing. Or she continues to do the things that got her grounded in the first place. We have a reward system in place. But no sooner does she earn the reward, she loses it. She cannot explain why she does not do what she is suppose to do. We have had many discussions. I am at my ropes end.