Is Your Blue Really Blue? [Metamerism]

It turns out blue is not just for the Smurfs! Introduce young geneticists to the Fugate family, known throughout Kentucky for their unusual skin tone. A two-day lesson from K20 explores dominant and recessive traits through partner...

How important is water quality where you live? The first module in a six-unit series includes four lessons on water quality. By applying the concept directly to the lives of pupils, they engage in meaningful learning. They read about...

The Blue Man Group, three bald performance artists painted blue, offer lessons designed to engage, intrigue, and excite the imaginations of all ages of learners. Groups craft a trickster tale, invent melodious mathematical instruments,...

The history of our understanding of the center of the universe is explored through this film. The ideas of Aristotle, Copernicus, Bruno, Descartes, and Herschel are included, as well as the new discoveries that have helped the theories...

Ever find yourself looking at a clear blue sky and notice something that seems to be floating across your eye? Well, you're not alone. Watch this short video to find out exactly what causes this and other common visual phenomenon.

Light travels fast... really fast. But that doesn't mean it moves instantly from its source to whatever object it hits. After watching this video students will understand that once generated in the sun's core, light takes thousands of...

Young scholars examine color perception and how it relates to metamerism.  In this color lesson students complete a lab activity that shows them the three basic components of color perception. 

What a neat interactive that interacts with the amount of water on Earth's surface. It begins with a brief audio introduction of the Blue Planet and how it got its name. Then, users click on the activity to play a game that calculates...

If humans can live without one kidney, how important can they really be? Investigate the vital role these organs play in filtering our blood, removing waste, and managing our bodies' water supply with this short animated video.

Staring out onto the ocean is often soothing and calm, but take a dip beneath the waters to find plenty of sounds and activity! This video clip studies the sounds of blue whales. Find out what their pulsing sounds might mean in this...