i think pretty much every school will give you a folder chock full o' info on their school & about the interview day. i've never taken anything other than that into my interview. some think it makes you look more prepared if you've written down questions beforehand. i just come prepared with a few questions in my head and that's been more than enough to keep the conversation flowin'. never hurts to ask the interviewer about their research if the convo gets slow. most likely they'll just about fill up the rest of the time talking themselves, (at least in my experience).