Help Obtaining Wireless Connection in the Classroom

[PartySNGer]

I go to Nebraska-Omaha and it isn't really a full wireless campus. In the business building I think there are a few routers, but my Netgear wireless card can only get 1 bar and it can't get a wireless connection. Is there some kind or range extender or stronger wireless card that could help me get connected? I'm kind of a noob when it comes to this stuff so I'm sure there is some kind of solution, but I have no idea what it is. Any help is appreciated, thanks!