CK-12 Foundation
Ck 12: Charging Objects
[Free Registration/Login may be required to access all resource tools.] The laws that govern interactions between charged particles are explained, and methods of creating a net charge on an object are described.
Wikimedia
Wikipedia: Charles Augustin De Coulomb
Spanish-language site lets students discover the life and work of this physicist and engineer, who is known for his studies of electric charges.
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.
Physics Classroom
The Physics Classroom: Put the Charge in the Goal
Students face a game-like challenge to use electrostatic forces to move a charged puck into a goal. By placing charges on the rink, a charged puck can be attracted and repelled around obstacles and into a goal.
National High Magnetic Field Laboratory
Magnet Academy: Electrostatic Repulsion in Van De Graaff Bubbles
A fun look at how Van de Graaff generators illustrate electrostatic forces. (Java tutorial)