My daughter uses Edmark and it has worked great for her. I have a tutor come once a week to the house for 2 hours of 1 on 1. It is a very hands on program. You could probably run it yourself with your son, it is pretty straight forward. Not cheap, but I purchased it used. Also Laureate Learning software has been a big help too. It is designed to be run completely independently. Also not cheap but if you go to their website (google it), you can order a free demo and see how your son likes the program. Good luck!