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, and don't consider it to be good science, but rather a bunch of anecdotes and catchy phrases that have helped to make her a household name without reliable support. 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.
