I think Newsweek comes out with an annual mag listing the top schools (grad and undergrad) in the nation divided by major. I'm pretty sure it's Newsweek, this years edition is bright green. You should look through it or purchase it, it is really helpful and gives statistics and other helpful information. I was advised not to make a choice based on rankings though but to find a school that will meet my needs (in other words one I can freaking AFFORD). For a while I was looking at the top 5 in my area but found other schools that actually were equal too, or better, than those schools but just didnt have the big name and hype that the other schools had.
Hope this helps