He may not be old enough for it yet, but I recommend Math-it. I used it with by 2 ADHD kids. Also, I was a 32 year old certified teacher and did not know my math facts! I was great with adding on my fingers and using tricks to add quickly. When I used the Math-it kit with my children, I finally learned my math facts! The least expensive way to get the kit is through http://www.rainbowresource.com Get the additional student pack and the guide book. It’s just as good, but you don’t get the box.