My 7 year old son is in 2nd grade. He does great at school and behaves well. He follows the rules and gets along with almost everyone. When he is at home, he has been acting awful! He is disrespectful of me, yells and talks back to me. He constantly fights with his 4 year old sister. It is about stupid stuff too-today he yelled at her and blamed her because she ate some of the popcorn they were sharing. He ended up crying and throwing a fit and going to his room. I am at my wits end with him. I don't know how to effectively discipline him anymore. I can't figure out what is the best way to deal with him. We've tried time outs, taking away electronics and priveledges. We've tried talking to him and letting him know that when he yells at us and is disrespectful it hurts us. I don't know what to do now. I know what we are doing is not effective. I think that it is so bad right now that I don't enjoy spending any time with him anymore. I dread picking him up from school because I know that he is going to get angry and talk back or yell at me. I want to have a good relationship with him but at this point I don't know what to do.