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.
Ducksters
Ducksters: Physics for Kids: Types of Electromagnetic Waves
Kids learn about the types of electromagnetic waves in the science of physics including microwaves, infrared, ultraviolet, radio, x-rays, and gamma rays.
Mocomi & Anibrain Digital Technologies
Mocomi: Nikola Tesla Biography
Interesting biographical information, fun facts, and famous quotes about Nikola Tesla known for his work with alternating current.