Building the Erie Canal

In this video segment adapted from American Experience, learn about the construction of the Erie Canal, the biggest public works project of its time.

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Burrowing Owl

In this video segment from Outdoor Nevada, learn about burrowing owls, yearlong residents of open, dry grassland and desert habitats, and the only owls that nest underground and are active both day and night.

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Bush on Lincoln

In this video from the PBS series Looking for Lincoln, Professor Henry Louis Gates, Jr. interviews former president George W. Bush about Abraham Lincoln and the controversial choices they both faced as wartime leaders.

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The Business of Bioplastics

This video excerpt from NOVA’s "Making Stuff: Cleaner" and accompanying demonstration introduce students to the production and importance of bioplastics, or plastics made from plant or animal products.

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Busterfield Library A-Z

This video segment from Between the Lions uses an alphabet song to review the ABCs, matching each letter with the name of a character from the show.

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Butterflies

This video from Vegas PBS features colorful insects known as butterflies, and looks at the coloration, species, life cycle, and migration habits within their habitat.

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A Cage to Save a Whale

In this Cyberchase video segment, the CyberSquad must estimate the measurements of Spout the Whale in order to find a cage that will fit him. 

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Calculating Clones

In this video segment from Cyberchase, Inez and Lucky figure out how to keep track of the number of clones as they continue to multiply.

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Calculating Rectangular Area

In this video segment from Cyberchase, the CyberSquad measures Judge Trudy's land claim by using tarps, fence posts and a grid made with rope.

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Calculating Speed

In this Cyberchase video segment, the CyberSquad calculates the speed of each broom.

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California's Water Supply

This resource developed from KQED's QUEST, uses California’s delicately balanced watershed as an example of how the water cycle operates.

Calorimetry

Do you know how many calories are in a macadamia nut? This video segment highlighting a Calorimetry experiment will give you the answer.

Can a Computer Fly an Airplane?

This video excerpt from NOVA shows how the computer system on the A330 airplane can fly the plane safely without a human pilot.

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Cancer - A New Treatment

In this segment from Curious, Mark Davis is motivated to develop a new, less debilitating treatment for his wife's cancer.

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Can Organic Farms and Mosquito Control Coexist?

Learn about one town's conflict over the issue of spraying pesticides to combat disease-carrying insects, in this video segment from Greater Boston.

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Can We Slow Aging?

In this video segment adapted from NOVA scienceNOW, scientists discuss a family of genes called FOXO that can significantly extend life span in worms—and in humans.

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Capturing Carbon

In this video segment adapted from NOVA scienceNOW, a scientist, inspired by his daughter's science fair project, develops a synthetic "tree" to remove excess carbon dioxide from the air.

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Carbon-Fiber Car of the Future

In this video segment adapted from NOVA, find out how cars made of a material stronger than steel and half the weight can help combat climate change.

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Careers in Plastics

Learn about opportunities for working in the growing field of plastics, including the emerging area of "green" technologies, in this video segment adapted from Pennsylvania College of Technology and WVIA.

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Carnivorous Plants of Texas

In this video adapted from Texas Parks and Wildlife Department, learn about carnivorous plants that act as both producers and consumers in an ecosystem. See sundews and blatterworts capture and digest insects.

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Carnivorous Plants of Cartwheel Bay

In this video segment from NatureScene, explore Cartwheel Bay, a wetland in South Carolina, and learn about the variety of carnivorous plants native to this unique landform.

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A Case for the Separation of Powers

This video segment adapted from American Experience introduces how John Adams called for the separation of powers in the Massachusetts Constitution into three branches: executive, legislative, and judicial.

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Catching the Kidnapper

In this video segment from Cyberchase, the CyberSquad and Digit construct a physical profile of the person who kidnapped Choocroca, a giant cybercrocodile.

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Cats

In this video segment from Nature, learn about cats and consider the possibility that the cat may become the number one choice of pet owners.  

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Cats - Yesterday and Today

In this video segment from Nature, discover the various roles the cat has played in our history.

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Cauca's Most Valuable Resources

This video segment from Women, War & Peace introduces Cauca, a resource-rich region in Colombia whose residents are threatened with internal displacement due to the interests of potential investors.

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The Causes of the 2008 Financial Crisis

This video segment adapted from FRONTLINE: "Money, Power and Wall Street" explores the changes in the U. S. financial market that ultimately led to the 2008 financial crisis.

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Cave Formation: Kane Cave

This video segment adapted from NOVA describes a simple experiment that confirmed the idea that microbes can accelerate the biogeochemical process of cave formation.

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Caves: Extreme Conditions for Life

This video segment adapted from NOVA raises the provocative idea that if life can exist in the most extreme environments on Earth — such as in dark, toxic caves — then perhaps living things can also survive in harsh environments on other planets.

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Celestial Sphere

This animation is a simple model of the apparent motion of the stars in the night sky. Ancient people described the motions as if the stars were all attached to a vast globe, or a Celestial Sphere, centered about the Earth.

Cell Differentiation

In this video segment from The Secret of Life school video, "Sex and the Single Gene" follow as a single fertilized egg cell divides, differentiates, and assembles into the tissues and organs of a new organism.

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Censorship

In this Wide Angle video, the people behind Kalam Nawaem, or “Sweet Talk,” a popular Arab television, discuss how they must carefully choose their topics and tone to not only increase audience interest, but to keep their program on the air.

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Center of Gravity: Pencil Balance

Watch the ZOOM cast learn about center of gravity by trying to balance a pencil on their fingers and noses.

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Centripetal Force

In this animation a ball bounces off the sides of the circle, and the number of sides double, until the circle appears to exert force on a ball that is constant in size and always directed towards the center.

Chalk Sculpture

In this video segment from Art in the 21st Century: Paradox, two artists create a public art piece using giant pieces of chalk.

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Challenges of Incubation

This video segment from Nature examines American Eagles along the Upper Mississippi River and their struggle to protect their eggs from predators as well as from the cold, extreme weather.

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Changes in the Ozone Layer

This video segment produced by ThinkTV demonstrates how ozone is created in the upper atmosphere, explains its beneficial role, and explores the problem of ozone depletion.

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Changes in Turkey

In this Wide Angle video, learn how the owner of a clothing manufacturer that creates conservative fashions for Turkish women has balanced his devout faith and commerce.

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Changing Arctic Landscape

In this video adapted from the Arctic Athabaskan Council, learn how warmer temperatures in the Arctic are transforming the landscape, triggering a host of effects such as permafrost thawing and insect infestations.

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Changing Views of Pluto

See images from the Hubble Space Telescope that show evidence of seasons on Pluto, in this video adapted from NASA.

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Characteristics of the Sun

This video segment adapted from NASA describes the basic characteristics of our star, the Sun.

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Charles Hamilton Houston: Laying the Groundwork for Integration

In this video from The Rise and Fall of Jim Crow, observe how Charles Hamilton Houston laid the groundwork for the landmark Supreme Court case Brown v. Board of Education as he documented separate and unequal conditions for black and white students in the south.

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Charles Hamilton Houston and His Legal Challenge Against Jim Crow

This video fromThe Rise and Fall of Jim Crow profiles Charles Hamilton Houston, the chief council for the NAACP, and his legal challenge against Jim Crow.

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Charlotte Hawkins Brown

Learn about Charlotte Hawkins Brown, founder of an educational institution for young African Americans, in this video segment from The Rise and Fall of Jim Crow.

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Chasing Tornadoes

In this video segment adapted from NOVA, scientists are on the hunt for tornadoes. Using Doppler radar, they gather data in the hopes of solving the mystery of how tornadoes form.

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Chemical Risks to a Fetus

Learn about the risks environmental contaminants pose for a developing fetus, in this video adapted from Contaminated Without Consent.

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Chemist and Biologist Catherine Drennan

In this video produced for Teachers' Domain, learn about MIT professor Cathy Drennan's research into microorganisms that remove carbon dioxide, a greenhouse gas, from the atmosphere.

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Chess Wager

Harry and his friend make a wager on a game of chess in this video segment from Cyberchase.

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Chicken Waste and Water Pollution

In this video segment adapted from FRONTLINE: “Poisoned Waters,” learn how unregulated waste from large-scale chicken farms contributes to water pollution.

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Chimp Politics

In this video from the PBS series The Human Spark, host Alan Alda and scientist Franz de Waal observe and compare two alpha-male chimpanzees’ different approaches to sharing at the Yerkes National Primate Research Center in Atlanta.

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