- The MathWorks Student Center (all sorts of useful information)
- A Very Elementary MATLAB Tutorial from The MathWorks
- Numerical Computing with MATLAB (textbook by Cleve Moler which can be downloaded for FREE)
- Learning MATLAB (link to an intro text written by Toby Driscoll, should be freely available to IIT students via IIT library)
- MATLAB 8: Getting Started Guide (should also be available directly through your MATLAB installation)
- MATLAB Webinar: Intro to MATLAB (you need to register for this, but it's free)
-
Official MATLAB Site -
Octave and 
Scilab, two inexpensive (FREE)
alternatives to MATLAB
Netlib, a collection of
mathematical software, papers, and databases -
Guide to Available Mathematical Software
-
Numerical Recipes, a series of books
with code for Numerical Methods - Some disasters attributable to bad numerical computing collected by Kees Vuik (Technical University of Delft)
- Understanding Mathematics: A Study Guide by Peter Alfeld (University of Utah)
- Programming Style from Wikipedia