A Simple Electric Circuit

As a Science teacher, one of my challenge is how to make my students understand a concept, especially an abstract concept, for example electricity. Electricity is a kind of energy so that we cannot see it by using our naked eyes.

In electricity, we also learn about conductors and insulators of electricity. Electricity can pass through conductors materials while insulators cannot. I think I need to construct an interesting lesson so the students can understand and memorize the concept better.

So I made a simple electric circuit consist of a battery, wires and a lightbulb. After that I demonstrated a simple experiment, by connecting some materials to the circuit.

The materials that we used are metals (paperclip, iron nail and aluminium foil) and non-metals (glass, wooden pencil and straw). Through this demonstration students could conclude that metals are good conductors of electricity as the bulb lighted up when they're connected to the circuit. In the contrary, non-metals are bad conductors or insulators of electricity as the bulb didn't light up when they're connected to the circuit.

There were a surprised thing when we tried to connect graphite (a black part of pencil that we usually use for writing) to the circuit. It lighted up the bulb! Wow! The students were so excited because they've seen something that they haven't seen before. I hope it will make them understand and memorize more until long period of time.

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