F.J.
I had this same problem with my daughter only that we didnt move to another country, we moved to another state. She was smart and popular at her old school but also became another person when we moved. She either didnt do her homework at all or waited til the last minute. I was always a nice easy going parent with her because she rarely gave me any problems. But I had to change all of that and show her who was boss. Now..I dont have any problems with her doing homework. She come in, eat a snack and know to immediately get started on homework. After that she is free to do whatever she want. My advice to you is to be the PARENT. Be firm and make him realize that you are the PARENT and he is the CHILD. Enforce rules and mean what you say. Parents should not quarrel with their kids.