Chicago Apartments, near the loop?

My best friend and I are moving from Maryland to Chicago in September/October. I will be attending Columbia College Chicago starting in January. We need to find an apartment/condo that is near the school. I know the school is in the loop area which I believe is expensive but I don't really know because I'm not from near Chicago. We are looking for two bedroom for around $800-900. Any suggestions as to where to look? I keep looking on craigslist but I don't know what ares to search for. Any help would be great.