Lawrence Berkeley National Laboratory
Berkeley Lab: The E Xperiment Files
Discussion of the scientific method and the use of X-ray microscopy as an experimental technique. Explains the use of X-ray microscopy in the study of malaria.
Discovery Education
Discovery Education: The Em Spectrum: Waves of Energy
Students are introduced to the electromagnetic spectrum through this group research activity. Each group investigates a different wavelength range within the em spectrum and reports back to class. Discussion ideas also included.
University of Colorado
University of Colorado: Physics 2000: X Rays
Here's a really simple demonstration of a fluoroscope. There are links to more information about the uses of X-rays as well.
University of California
Center Science Edu.: Electromagnetic Radiation on Trial
Here is a 1-5 day unit on electromagnetic radiation that features a teacher guide and student activities with extensions.