Chicago can be a tricky city to find a room in a good location at a reasonable rate. So many conventions taking up the reasonably priced rooms. I usually have to book 3-4 months ahead of time to get what I want. Since your daughter will be going in just a few weeks, I would recommend looking at the following:

http://www.smarterliving.com or click on http://www.smarterliving.com/hotel/

I believe the Surf is recommended by Frommer. Check his recommendations at http://www.frommers.com

I generally stay a little north of downtown as the El can get me to the loop quite easily. Check out http://www.cityinns.com/

If push comes to shove, there are several youth hostels in the city. I can give you that info if you are interested. Just contact me directly.

Good luck Debbie in NC