Mostly discussion, this lesson explores the importance and methods of hand washing. A few true stories of community illnesses spread by the neglect of washing hands serve as an anticipatory set. The activity is most memorable if you are...

Students watch a demonstration using a Slinky during a lecture on basic wave properties. Properties addressed in the demo include wave speed, wave length, amplitude, period, and frequency.

Students participate in an exercise/experiment designed to show how environmental pollution can affect the quality of drinking water.