Exploratorium
Exploratorium: Curie Temperature
In this experiment, students experience the Curie point--and what happens when a piece of iron gets too hot to attract a magnet.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Electromagnets (Grades 3 and 4)
This lesson helps students to understand the difference between magenets and electromagnets. They will also create an electromagnet.
Other
Family Education Network: Heavy Metal
An engaging site that provides interesting facts about magnets. Solve a problem and discover how to create a compass.