Resources for Visualization etc ....
Some Sample Medical Images
Some Image Processing Research

What is MATLAB
Shodor Interactivate Page
Internet Problem Solving Activity
Tsunami
Some Medical Images
NCSA Resource Page
U.S. Board of Geographical Names
Computer Graphics Educational Material Sources

Some Visualization Tools and Examples
A Quick Guide to ImageJ.
Human Computer Interaction Lab (Un. Of Maryland).
ImageJ Resource.
Walrus Gallery
GNU Plot - Freeware
VTK
NSF Molecular Visualization Resources
NASA/IPAC Infrared Science Archive - Iris Data!

Some Tutorials
Tutorials for different software
VTK
NSF Molecular Visualization Resources