What does being a lefty have to do with it, out of curiosity?
I've heard various ideas on the roles of right hemisphere/ left hemisphere dominance- here's an interesting discussion of the topic:
http://www.visualspatial.org/files/idvsls.pdfI have previously found Silverman's work less than compelling. I wouldn't use handedness as any sort of criterion in determining a child's educational needs, except maybe in choosing a pair of scissors.

Agreed- handedness doesn't determine educational needs. Do you think it has any influence over specific abilities? It's hard for me not to think of it as part of the uniqueness of our DS, as his left-hand dominance was evident at such an early age- we chalked up many of his differences to being a lefty- before we linked them to aptitude.