In this design and technology lesson, students learned about switches and their role in controlling electrical circuits. The instructor explained the difference between open and closed circuits, emphasizing that a switch can either allow or stop current flow. They introduced key terms, such as “single pole single throw” (SPST) and “single pole double throw” (SPDT), which describe different types of switches based on their construction. The lesson included visual aids to help students understand how these switches operate within a circuit.