Huh??? Disability and math?? That should be interesting... I seem to think that I'm a bit 'brighter' when it comes to math compared to hearing peers.. but that's just me... (coming from someone who preferred to read math books growing up.. lol).. I'd like to learn of your report... good luck.. here's a couple to get you started:
http://www.learner.org/theguide/deaf.html
http://clerccenter.gallaudet.edu/pro...un98/math.html
Seems like you can find a bunch of them by google.com -- "math and deafness"