This audio excerpt captures the beginning of Bayard Rustin's 1967 "Freedom Budget" speech, describing the social and economic impact of racism over time.

This video segment explores the world of the beaver, including the biology of the species and, more importantly, its ability to transform an ecosystem for its own benefit.

This video segment describes how the Australopithecus afarensis skeleton known as Lucy could have been fossilized. Footage courtesy of NOVA: "In Search of Human Origins."

This video segment from NOVA: "The Mystery of Animal Pathfinders" explores honeybee communication and navigation.

Cocos Island, a remote volcanic summit in the middle of the Pacific Ocean, serves as a beacon for hungry predators, including thousands of hammerhead sharks that travel here each year in search of prey. This video segment from NOVA: "Island of Sharks" depicts some of the common predator-prey interactions that take place in the nutrient-rich waters surrounding the island.

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.

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 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.

Blend phonemes and practice long "i" sounds with NYCDOE Universal Literacy Reading Coach Anna Scretching-Cole. Students will practice blending and reading with the long "i" sound with a focus on the "igh" and "-y" spelling.

The Storm of the Century: The Blizzard of 49 is a WyomingPBS documentary. This documentary tells the story of the worst series of storms in Wyoming's history. But for all the tragedy and loss, suffering, and death, there was hope and heroism, unselfish sacrifice, and generosity. Students will learn about the Blizzard of 1949 and how the State of Wyoming and the Civil Air Patrol responded.

The resource videos are based on this documentary and include associated lesson plans. There are three video clips. Clip one starts at the beginning and ends at 2:50 minutes, Clip two begins at 3:50 minutes and ends at 5:50 minutes, clip three begins at 6:00 minutes and ends at 8:41 minutes.

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.

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.

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.