Does anyone recommend purchasing materials and studying for the Stanford-Binet test or does that really help?
Noooooo. IQ tests aren't really the kind of thing you can prep / study for, and even if you could somehow get materials, all you would do is invalidate the test results.
There's some good information about preparing for testing here:
http://www.hoagiesgifted.org/test_prep.htmYou might want a more-comprehensive assessment than "just" an IQ test, which might give you more information about how a learning disability might impact test results. This page has more information, although I think it's not talking about exactly what I mean:
http://www.hoagiesgifted.org/assessing_gifted.htm