A instructional activity through which students identify, understand and work with important vocabulary words found in an online article on biodiversity. Based on the "Ten Important Words Plus" strategy that teachers can employ as part...

Not only will you find a description of a good unit, but you will find all of the handouts you will need including directions, letter home explaining the unit, websites to be used, and worksheets.

A history lesson that takes students through an exploration of the genocide of the Cambodian people led by Pol Pot's rebel forces in the late twentieth century. Consider what should be done to help Cambodians cope with this memory....

This animated essay from the NOVA Web site examines the design of Galileo's refracting telescope and Sir Isaac Newton's reflecting telescope.

This interactive brainteaser from the NOVA: "Voyage of Doom" Web site challenges you to figure out what causes an object to sink.

In this media-rich essay from the NOVA: "Mystery of the First Americans" Web site, learn about the atomic structure of radioactive carbon and how it can be used to determine the age of organic remains, such as bones and teeth.

This interactive activity from the NOVA Web site looks at the fundamental forces and particles that make up all matter. A thorough description of each elementary particle is provided including their mass, charge, spin, strength, and range.

There's more to a fireworks display than meets the eye. This interactive activity from the NOVA Web site looks at the technology behind each burst of light.

This illustrated document from the AMERICAN EXPERIENCE Web site examines the "zones of destruction" caused by nuclear weapons.

This interactive activity from the NOVA Web site challenges you to think like Einstein and understand how time travel might be possible.

Examine this graph from FRONTLINE/NOVA: "What's Up with the Weather?" Web site to see dramatic increases in three greenhouse gases over the last two hundred years.

You're the geneticist now. In this interactive feature developed for the companion Web site for NOVA/FRONTLINE: "Harvest of Fear," use the latest in genetic technology to engineer your own "supercrop" of tomatoes.

Find out how DNA profilers analyze bits of tissue to identify human remains. From the NOVA: "Lost on Everest" Web site.

Will the Leaning Tower of Pisa give way to gravity? In this interview from the NOVA Web site, engineer John Burland relates the difficult job of saving the tower.

In this interactive activity, from the Web site developed for the PBS series "Building Big," think like an engineer and use your knowledge of dome design to match the right type of dome to the right location in a fictitious city.

Explains the significance of Hispanic Heritage Month and provides a huge collection of links to websites looking at Mexican and Hispanic art and culture, as well as some lesson plans.

In this interactive activity from the Web site developed for the PBS series "Building Big," investigate hypothetical structural emergencies and figure out how to repair them.

Examine these graphs from the NOVA/ FRONTLINE Web site to see dramatic increases in the temperature of Earth's surface and greenhouse gases in the atmosphere.

How does DNA perform those all-important functions of replication and protein synthesis? This interactive feature, from the Web site developed for the PBS series "A Science Odyssey," will help you explore and understand the secrets of DNA.

This illustrated feature from the American Experience Web site highlights the frequently forgotten inventors of several useful, innovative technologies.

Survey potential bridge sites, research bridge design, and select the right bridge for the right location in this interactive activity from the NOVA: "Super Bridge" Web site.

The story behind Jocelyn Bell's role in the discovery of pulsars is told in this colorful, comic-book-style resource from A Science Odyssey Web site.

Learn how scientists regulate a nuclear reactor in this animation-enhanced essay from the FRONTLINE Web site.

This illustrated timeline from the NOVA Web site turns back the clock to the late 1500's to relive the dramatic life of one of the world's most renowned scientists.