I have a 10 year old girl and understand. She is an amazing student and athlete and teachers and camp counselors adore her. At home we are starting to see glimmers of the awful teen years to come. She rolls her eyes, thinks I don't know anything, that I'm her servant, etc. Part of that I know is because she feels so comfortable and safe with us. But I try to be consistent and not to respond when she is disrespectful or demanding. It's hard though because sometimes it's just easier to give in.