Aquaman...I'll give him the benefit of the doubt that perhaps he has done all the research but is looking for some personal quotes to emphasize his points.
So...MnE, what is the exact topic of your thesis? I don't quite understand how you're doing a thesis for a class, do you mean a TESOL program? I'm also doing an MA in TESOL and my thesis will also be about deaf students, but I'm doing a case study so all comments will be directly from the students themselves. (Well, as interpreted into English by me, probably.)
As Aquaman says, though, you'd do better to post in the education forum, and drop the "intelligent" from your title as it doesn't come across well at all.