I had tried to make a class to teach how to make basic PCBs. The project was a simple RGB LED and and some resistors to limit the current so that it could be driven directly from the pinouts of an arduino. Unfortunately, I got a bit out of hand in creating material. The part introducing students to LEDs, PWM, measurements of luminescence, and basic V=IR stuff is mostly complete.
In hopes these documents may be useful to someone else, I have uploaded them here.