Bianca visits a bike shop and learns how bicycle gears work in this Cyberchase video segment.

This Cyberchase video segment features Bianca, who must figure out the fastest route to a movie premiere.

This video segment from Cyberchase introduces the idea of inverse operations as Bianca imagines herself as a spy.

Bill Rice recalls how German soldiers began surrendering towards the end of the war in Europe. He also discusses how his platoon was involved in liberating prison camps in Germany in this video teaching module from the KACV's local perspective on "The War."

In this video segment adapted from NOVA scienceNOW, scientists discuss their attempts to grow human body parts in a jar.

This video segment from Evolution: "Extinction!" shows the impact of invasive species on native ecosystems.

This ZOOM video segment shows how to create a self-contained environment and explores evaporation, condensation, and precipitation.

This interactive resource adapted from NASA describes the different temperature, precipitation, and vegetation patterns in seven biomes: coniferous forest, temperate deciduous forest, desert, grassland, rainforest, shrubland, and tundra.

There are almost as many types of bird beaks as there are types of food that birds like to eat. This collection of images shows a wide range of beaks and the types of foods handled by each.

In this Nature video, learn about the extraordinary impact that birds have on the agriculture of a small Indian community.

In this video adapted from NASA, two members of a NASA research team working to produce carbon nanotubes share some background behind this new technology, show examples of how it will be useful, and explain the various tests being performed to ensure readiness for spaceflight.

In this video segment, adapted from NOVA, Dr. Judah Folkman uses the scientific method to discover how cancer cells induce the formation of new blood vessels, which in turn nourish those cancer cells.

When it comes to corn, Indigenous people have long known the benefits. Host Dr. Lee Francis of Laguna Pueblo discusses the health benefits of a classic Indigenous staple food: blue corn mush. What makes blue corn blue? Why is ash added to traditional blue corn mush? What makes it so healthy?

Andrew Branca, a high school student from Central Academy of Technology and Arts, in North Carolina talks about how he was inspired to write Boal after attending a summer theater workshop on Brazilian theater activist Augusto Boal. Cast members discuss what it was like to collaborate on the playwriting process and why they felt it was important to start a serious discussion on racism and Islamophobia.

Sensitive: This resource contains material that may be sensitive for some students. Teachers should exercise discretion in evaluating whether this resource is suitable for their class.

Boal is a play written and performed by high school students from the Central Academy of Technology and Arts in Monroe, North Carolina. Boal brings a variety of social issues to the stage, focusing on racism and Islamophobia.

The play was inspired by Augusto Boal, a Brazilian theater director, writer, and politician. Boal was the founder of the Theatre of the Oppressed, a theatrical group dedicated to creating political change.

The performance was taped as part of the High School Theatre Festival during the Southeastern Theatre Conference.

Sensitive: This resource contains material that may be sensitive for some students. Teachers should exercise discretion in evaluating whether this resource is suitable for their class.

Throughout the day, your nervous system monitors and makes endless adjustments to your body's basic systems -- all to keep you alive. This interactive feature illustrates the complexity of such a task.

This video segment, adapted from NOVA scienceNOW, presents basic concepts of physics behind booming sand dunes. See how surface tension affects potential and kinetic energy and how it all works together to create sound.

Find out how serious head concussions can be in this video segment adapted from NOVA scienceNOW.

This video segment from The Human Spark observes the brains responses to a series of cognitive tests.

In this demonstration of chemical change, the presenter blows breath into a methylene blue solution releasing carbon dioxide which acidifies the water and changes it from a bright blue color to green.