Khan Academy
Khan Academy: Force Over Distance
Can you think of an experiment that would let you see how magnetic force depends on distance?
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: About Magnets (Lesson Plan)
This site provides a lesson plan which includes a hands-on activity about magnetism and magnetic fields. Parts of the plan would be easily adaptable as a student project (for any grade level).
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Magnets (Lesson Plan)
A teacher lesson plan which includes six hands-on activities regarding magnets. Pupils will be able to experience magnetism; explain how magnets, magnetic poles and magnetic fields are related; and formulate the force law for magnets.