[MrForbes]

I suggest little theory, and much practical....especially stuff like a good understanding of what size wires to use with what size fuse and what size load, and how to do the actual wiring work so it is safe and reliable. No shiny wire showing where you crimp on the connector, use crimp on connectors with the correct size, soldering lessons, heat shrink applictaion, etc. And some theory and practice on how to make sure you are connecting things properly, especially confusing things like Spikes (no, I'm not joking, people do connect the output to the power source, etc) and PWM cables. Teach how to use a DMM to troubleshoot various real life problems, such as finding the voltage drop in a circuit due to a bad connection, learn about the voltage on different types of batteries at different levels of charge, etc.

Maybe include a demonstration of how fast a wire can get hot when not adequately protected by the correct size fuse/breaker.

Now you have a mechanical engineer's take on the subject....