Students often fail to see the "beauty" of logic and truth values (tables). They do not see a need for studying such "nonsense" and perpetually ask the question, "When are we ever going to REALLY use this?"
Logic is one aspect of mathematics where the teacher can clearly show WHERE the material can be applied to the real world. A simple understanding of electrical circuits is needed. These necessary concepts can be easily grasped.
switch breaks the circuit.
switch makes the circuit complete.
If you are not able to use actual switches, lights, batteries and wires, you can still demonstrate the concept of logic and circuits by using magnets and pencil and paper drawings.
Whether you use actual circuits, or you use magnets and drawings, the concepts can be presented in a similar manner. The illustrations on this page will show actual circuits, but remember that you can accomplish the same process using paper and pencil.
You can arrange any patterns you wish your students to investigate. You can assign a logical sentence and ask the students to arrange the circuits, or you can show a model and ask the students to determine the logical sentence.
You will be amazed at how quickly your students will grasp this concept of logic circuitry. Most students have a good grasp of parallel and series circuitry from their Science classes.
For students who are having difficulty understanding truth values (or tables), this activity will give them a different perspective on the topic.