We are dealing with the same thing. Someone in a previous post mentioned www.lumosity.com which has some brain games however ds6 shied away from the ones that required too quick of a response. Maybe we can work our way up to those. You can do a 7 day free trial of all the games. Some games are free all the time.

I think we may be dealing with perfectionism and slowing down for easier questions but I'm not sure. Another thing that might not apply to your son but worth mentioning... our psychologist said that there is a high correlation between ADHD and slow processing speed.