Start 62 Inter. This book begins with task cards that investigate the nature of like and unlike charges, establishing the reason why current flows through wire.
Students then improvise bulb and battery holders, and build a variety of different switches.
They'll configure them in parallel and series arrangements, using Ohm's law to predict how the current will flow. They'll even split water and recombine the gases in a safe mini-explosion. Gather these and other simple materials, photocopy the 36 task cards, and you're ready to explore TOPS Learning Systems hands-on.