Thanks for the responses so far... We are home schooling but his achievement in reading (he's one of those 99.9 kids on the WIAT)and language arts testing is well beyond grade-level and he finds instruction a bit onerous. We've been letting him fly through standards to find his place. His public school tested him with the 2nd grade end of yr test in K and he outscored the 2nd graders. So we started with third but he is Dysgraphic so learning writing conventions takes creativity.
Basically we need a broad program he can dig through as fast as he wants, choosing his own level. I'm afraid nothing will last a whole year so I am a little cautious on price.