Michigan State University
Michigan State University: Physics: Coulomb's Law
Here is a presentation of Coulomb's Law and the electric field potential formula, with example problems.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Introduction to Magnets (Classroom Unit)
A teacher unit which includes several hands-on activities about types of magnets, magnetism, and electrostatics. An activity designed to suit all grade levels. Many parts of the activity would be easily adaptable as a student project.