Brigham Young University
Brigham Young University: Forest of Rhetoric
This site is provided for by the Brigham Young University. Almost anything you would want to know about rhetoric and speech is here with great examples and explanations. Intended for a college-level audience, but plenty for younger...
University of Colorado
University of Colorado: Physics 2000: Cat Scans
A CAT Scan is compared to cutting up a fruitcake on this basic, yet interesting site. This description of CAT Scans is intended for a younger audience and also offers links to the visible human project.