Hi J.,
There are many programs out there for kids with learning disabilities. From what I've seen based on your email, there is learningrx.com, ldaintl.org, brainage.com, and pacer.org. and many more.
My son has Down syndrome and it seems that so many times there are many pieces to the puzzle and the hardest part for a parent is figuring out what those pieces are. We need to remember that there is no "magic pill" that will fix things, but several parts, layered together, that add up to a bigger difference.
Some other ideas that you may want to look into: Diet - have you tested for Celiac? Glutens, wheats, caseins can have a big impact on attention span. What about Dyslexia? You might look into a vitamin called Mighty Mins which has a very interesting study done regarding biochemical/nutritional approach to behavioral issues. I carry them in my store and they are the best selling item I carry. If you want more information, feel free to email me at ____@____.com
Try ruling out any medical aspects and take it from there.
Also, regarding reading, kids with learning disabilities many times sight read before phonetically reading. Because of the way the brain works, they can be mentally incapable of processing phonics until they are older (has to do with memory channels and short term memory). Since 50 to 70% of k-5 reading is sight words, you might look into a sight reading program like eReadingPro (also in my store). My son is 5 and is starting to sight read.
Good luck with everything and keep at it. It can be so frustrating for you and for him, but something will click.
K.