1. The lesson plan teaches students about switches and how they are used to break electrical circuits. Students will brainstorm what they know about switches, make human circuits to light bulbs, and build model circuits with switches. 2. Activities include building a circuit with a switch in small groups and recording observations of which bulbs turn on. Students may add switches to control lights, alarms, and motors in a model town. 3. Assessment tools are oral questions, worksheets, and practical activities to have students describe predictions and observations of circuits and identify patterns. Students will understand how switches are used to control electricity in circuits.