Third graders solve a cryptogram by decoding a message written with wingdings.  In this decoding instructional activity, 3rd graders solve a message related to magnetism.  Students have notes about magnets once they've finished.

This site provides links to a variety of government-sponsored overviews and articles on electromagnetic fields and their associated health risks.

This site explores the history of power lines and cancer associations, as well as dispelling the myth. The science is explored by citing known facts, studies and experts in the field.

The World Health Organization probes into the feared associations between electromagnetic fields (EMFs) and cancer. Check out "What is EMF?" for detailed summaries on what electromagnetic fields are and the possible health effects, or...