In this video from DragonflyTV, Mary Lynn, Jessica and Aren test different model rocket designs to find out which features increase how high the rocket flies.

In this segment adapted from ZOOM, cast members use computers to program a robot in preparation for the FIRST LEGO® League Challenge tournament.

This illustration from the Lunar and Planetary Laboratory shows the approximate sizes of the planets relative to each other. Note that the planets are not shown at appropriate distances from the Sun.

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

How do researchers read the tiny As, Gs, Ts, and Cs that comprise DNA? This step-by-step explanation shows you. From NOVA: "Cracking the Code of Life."

This video segment from NOVA: "Cracking the Code of Life" looks at one of the key players in the race to decode the human genome.

Firefighters fight a raging fire on a wild horse range in Montana in this video segment from Nature.

Learn about fire safety and the importance of having a fire safety plan. Listen to a local fire fighter talk about his/her job and equipment.

This video segment from IdahoPTV's D4K describes the 3 elements that are needed for a fire triangle, and how the job of firefighters is to eliminate at least one of the elements. Learn how wildfires spread, what firefighters need to know in order to fight fires and why rehabilitation is important after a fire.

The members of Freezer Burn sing about eating vegetables during every season.

Mixie visits a local farmer’s market and we learn all about veggies.

This animated video segment adapted from the Centers for Disease Control and Prevention, featuring American Indian characters, promotes replacing sugary foods with fruits and vegetables.

Choose the healthy snack by selecting the food that comes from a farm or a garden.

Growing chocolate could help preserve the rainforest and reduce carbon dioxide in the atmosphere: "Morning Edition" audio broadcast.

Chocolate makers explain the elaborate engineering and chemistry behind this tasty treat.

In this video segment from Cyberchase, the CyberSquad learns how to read a thermometer as they try to keep their chocolate sculpture from melting.

Develop skills in measuring dry and liquid substances by creating individual "dirt puddings" from a chocolate pudding mix and gummy worms. Share the activity with a friend.

This animation from NASA visualizes the steps of the water cycle, including precipitation, evaporation, transpiration, and condensation.

Large or small, urban or rural, most watersheds have certain attributes in common. This segment from KET’s Raindrops to Rivers uses animation to show the full scope of a watershed from its collection to its final destination.

This video demonstrates how peat filtration beds at Bernheim Arboretum and Research Forest near Louisville, Kentucky purify and conserve wastewater and eliminate one cause of non-point-source water pollution.

How does an airplane stay aloft when upside down? This media-rich essay from the NOVA Web site offers an explanation based on Newton's third law of motion.

In this video from WVIZ Cleveland, learn about World War II first hand as a veteran and grandfather writes a letter to his grandson about what it was like.

Just after World War II, nuclear scientists turned their attention from fission to fusion. This video segment adapted from AMERICAN EXPERIENCE looks at the beginnings of thermonuclear power generation.

In this activity, students will analyze primary sources with an eye for cause-and-effect relationships. They will identify the roles of government policy and technological improvements in the settlement of the West, and explain their impact on Native Americans. Find a teacher guide to complement this activity on the DocsTeach site of the National Archives Experience.

People have created media in different ways in different places and times. This short animation provides a quick lesson on the history of communications and media arts.

In this audio profile adapted from Raven Radio/KCAW, Alaska Native Taqulik Hepa, deputy director for the Department of Wildlife Management for the North Slope Borough, discusses resource management and subsistence living.

Northern Arizona's rainy season accumulates almost 3/4 of the year's rain in just a few months, and is just in time to aid tobacco plants used by Native Americans: "Morning Edition" audio broadcast.

Wilson and Ditch visit the Grand Canyon in Arizona. They learn about the world’s deepest hole and are blown away by the view, especially when they go onto a Skywalk that hangs over the Canyon.

See an aerial wide shot of Glen Canyon Dam and Lake Powell in Page, Arizona, in this Building Block video.

In this video profile, ethnobotanist Dave Morris studies how native peoples in Arizona gathered plant materials for buildings, utilitarian objects, and spiritual uses.

In this What's Up in the Environment? video segment, an international team of scientists in Arizona's Biosphere 2 laboratory studies the impact of increased carbon dioxide emissions and how that might affect our future global environment.

This video segment adapted from NOVA explores the effects of the Glen Canyon Dam on the beaches, wildlife, and vegetation of the Colorado River.

On this underwater excursion, the Pteranodon family meets up with Carla Cretoxyrhina, a young shark who turns out to be much nicer than her reputation suggests. They learn that the Cretoxyrhina is a fish that uses their sense of smell to know where other fish are for them to hunt!

The nutrient-rich waters surrounding Cocos Island set the stage for astounding predator-prey interactions, as seen in this video segment from NOVA: "Island of Sharks."

Join Chris and Martin as they create an underwater world, and learn the proper techniques to build an aquarium!

Einstein called Galileo the "father of modern physics." This media-rich essay from the NOVA Web site looks at Galileo's quest to understand the mathematics of motion.

How did Galileo figure out the mathematics of falling bodies? This video segment adapted from NOVA examines Galileo's work on motion.

This interactive activity from the NOVA Web site samples Galileo's experiments with falling objects, projectiles, inclined planes, and pendulums.

This interactive timeline from the AMERICAN EXPERIENCE Web site features influential technological innovations from 1750 to 1990.

This video segment adapted from NOVA scienceNOW profiles Franklin Chang-Díaz, a scientist who is working on plasma-powered rockets and was NASA's first Latin American astronaut.

In this video profile, chemist Christy Haynes and her students study how different nanoparticles interact with our immune system to ensure their safety.

In this video from DragonflyTV, kids learn programming from the Computer Clubhouse, an after-school program run by the Museum of Science in Boston.

In this video segment adapted from Design Squad—a PBS TV series featuring high school contestants tackling engineering challenges—students employ the concepts of tension and compression to build a suspension bridge without the aid of power tools.

In this segment adapted from ZOOM, cast members use computers to program a robot in preparation for the FIRST LEGO® League Challenge tournament.

Discover the relationships between living things that ensure their survival. Explore and observe flowers and flower parts, and collect flower representations to make a classroom flower book.

Learn about different types of dinosaurs from the Cretaceous and Jurassic periods. Compare skeletons, sizes and other characteristics of these dinosaurs.

Estimate the length of various dinosaurs using modern animals as non-standard units of measurement. Compare the sizes of all the dinosaurs at the end of the game.

In this segment adapted from ZOOM, cast members use computers to program a robot in preparation for the FIRST LEGO® League Challenge tournament.

It's a profession that can take you from the depths of the ocean to the far reaches of outer space, from within the microscopic structures of the human cell to the top of the tallest skyscrapers. In this stills collage adapted from The American Society for Engineering Education, learn about some of the most popular engineering fields.

The first step in choosing a career is to understand opportunities in an area of interest to you. In this interactive based on Penn State Public Broadcasting’s Geospatial Revolution project, explore several UPS jobs arranged by qualifications.

Join Chris and Martin as they explore a big North American city, looking at the amazing variety of wild creatures that thrive in an urban habitat.

In this video profile, Corliss Outley is a social scientist who studies what kinds of activities city kids like best and what things they would like to change about their neighborhoods.

Sometimes it is challenging to comprehend the forces that effect out everyday life because most forces we can't see. This video segment from SPARK shows how one artist makes them visible.

This video, adapted from NOVA, showcases the competing engineering plans designed for landing a person on the Moon for the first time.

In this video segment adapted from NOVA, NASA learns hard lessons from the first American attempt to do work while "walking" in space. The video also explores Newton's third law of motion.

This interactive timeline from NASA journeys through the last century, detailing key discoveries, experiments, missions, and other events that brought robotic space exploration from science fiction to reality.

In this video adapted from QUEST, discover that some of the rules of physics and baseball are one and the same.

In this video from DragonflyTV, Reed and Nick conduct experiments at The Science Place to decide whether the sweet spot on an aluminum bat is the same as the sweet spot on a wood bat.

Explore how baseball players apply Newton's first and second laws when they are running the bases.

In this Super Fab Lab video from the “Sid’s Rainy Play Date" episode of "Sid the Science Kid," kids learn to observe changes in the world around us when it rains.

This animation from NASA visualizes the steps of the water cycle, including precipitation, evaporation, transpiration, and condensation.

Sid involves the audience members in the show and asks them to answer an estimation question! Sid's parents get the chance to sing all about estimation and how it allows people to make the best guess when there may be too much of something to have an exact number.

Discover how scientists are using computer simulations to explore the shape of every one of the billions of nerve cells that make up our brains— the component parts of the intricate neural circuits that allow us to move, see and hear, feel and think.

See if you can put these sounds back together in this sonic jigsaw puzzle.

Explore the use of variables, sequence and trial and error to recreate a secret pattern.

In this video segment from Cyberchase, the Teleporter breaks and the CyberSquad must try to fix it using clues given to them by Ms. Fileshare.

This video segment from IdahoPTV's D4K takes you on a flight with a young student and a pilot as you learn about the 4 aerodynamic forces which are present when air is moving past an object such as an airplane.

In this interactive activity from NOVA, learn about the aerodynamic forces of lift and drag and how critical they are to the operation of all sorts of devices.

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.

In this video segment adapted from NOVA scienceNOW, follow scientists as they test a new theory suggesting that lightning here on Earth is triggered by cosmic rays from far-away dying stars.

In this video profile produced for Teachers' Domain, meet teacher Dustin Madden, an Iñupiaq who hopes to inspire students to take an active role in protecting the natural environment by giving them a foundation in math and science.

In this interactive activity from NOVA, learn about the sophisticated scientific instruments on two identical robotic rovers that have explored Mars — Spirit and Opportunity.

This interactive activity produced for Teachers' Domain explores areas of research and innovation in green technology.

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.

Analyzing how whisker sensations get processed by rats’ brains is providing a powerful model that’s helping reveal the mysteries of human beings' own sense of touch.

While we tend to think of plants as stationary, they are in constant, though very slow motion, as they respond to environmental factors. Watch plants move in time-lapse videos in this interactive activity adapted from Indiana University.

In this video produced for Teachers' Domain, meet researcher Karmella Haynes, a synthetic biologist who is using biotechnology to create living "devices" that help visualize how cancer develops.

This interactive activity produced for Teachers' Domain examines several career paths available in the biotechnology field.

This video segment from Interactive NOVA: "Earth" looks at photosynthesis, the chemical process plants use to make their own food.

Consider that humans and bees are attracted to the same shapes, patterns of color and scents in flowers. Learn how plants have evolved to attract both humans and bees.

Listen to bird songs and try to figure out which are songs, which are companion calls, and which are alarms.

Use an atlas to explore towns and cities named after planets or constellations. Discover how constellations got their names and were assigned their boundaries in the sky.

In this video profile, astronomer Marianne Takamiya studies how stars were born using a telescope high atop Hawaii's highest mountain. (Spanish version also available)

Determine the correct angle at which to place a telescope in order to see as many stars as possible.