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This is a demonstration you can use to show learners how valves and pumps work in concert to move blood through the circulatory system.

This is an online simulation of how sound changes due to environment. How does place--like a cave, a pier, or a forest--affect certain sounds? Move the sound pieces around and change the location...

In this activity, learners make a paper cone and use it in a window to measure the length of the shadow over the course of a day. Learners then repeat the same experiment a month later. In another...

Experiment with friction and make bearings for a whirligig! This activity is a nice introduction to friction and bearings and demonstrates why bearings are useful for spinning. A related video show...

Make a one-string "guitar" by stringing a cup with some fishing line. You amplify the plucking of the string by placing a piezo contact microphone and mini battery powered amplifier...

Experiment with liquids of different densities and create liquid layers. For example, oil and water have different densities: oil floats on water because it is less dense than water. A liquid that...

This online activity lets learners test their ability to 'read' facial expressions. Learners watch videos that show different facial expressions, then choose which emotion they think is...

In this interactive Quicktime computer game, learners use archaeological techniques and strategies to "dig up" a hidden image. The game has an easy and hard setting. This game is part of...