My son was at our house on house arrest for about 8 months. We didn't lock the Internet, since that's his main form of entertainment. He did help around the house, but that's kind-of his nature. It was actually a nice experience having him sober for so long, and we got in a habit of watching some TV shows together, having dinner, etc. I think it's important to monitor who visits, and we did end up having to prohibit "guests" from coming over. It wouldn't be very difficult for a so-called friend to bring over some drugs. The drug testing is probably a good idea, also. Otherwise, I'd say try to keep a normal atmosphere, and he might participate in the household activities out of boredom if nothing else. Good luck with the placements you're seeking for him. Long-term house arrest is very challenging for everyone involved, and the parents do end up feeling like jailers at times.