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.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Fish and Clip
Primary activity to help "students understand some of the characteristics of magnets." Would work well in conjunction with a theme on underwater creatures or fish.