This video from KET traces the energy transformations that occur when coal is burned to produce electricity. Some of the mechanical processes are also described.

In this adapted ZOOM video segment, cast members get hands-on in the recycling process by using old newspapers to make new paper.

In this video segment adapted from ZOOM, cast members make a seismometer and experiment with different ways to make it register movement.

This video adapted from NASA explains how a magnetometer determines magnetic fields around planets.

This video segment from NOVA: "The Mystery of Animal Pathfinders" explores how the migratory patterns of shorebirds have evolved to coincide with the spawning of horseshoe crabs.

Two astronauts aboard the International Space Station (ISS) describe mass and weight and the differences between the two in this video from NASA’s Teaching From Space initiative.

This video segment from New York Voices features Chinese American architect Maya Lin.

In this Cyberchase video segment, the CyberSquad helps resolve a dispute about the squares on the Gollywood Walk of Fame.

In this Cyberchase video segment, the CyberSquad must measure the length of the rope that will lower Digit from the ceiling to remove the voice box from a statue of Hacker.

In this activity, students will focus on dividing fractions, starting with single-digit denominators and working up.

This video segment adapted from Discovering Women profiles Fermilab physicist and Harvard professor Melissa Franklin.

All animals develop and grow over time. The animals in this video segment, however, undergo very dramatic changes on their way to adulthood -- a developmental process known as metamorphosis.

Learn about an important physics experiment that uses an invention that manipulates light in this interactive activity adapted from NASA.

In this video from DragonflyTV, Tiana and Sammy measure, record, and analyze the results of a drop box test to find out how everyday items behave in microgravity.

Migrant construction workers from rural China describe their living conditions in Beijing in this Wide Angle video segment.

Chinese migrant workers give insight into their status, lack of power and vulnerability in the new economic order in this video from Wide Angle.

This video segment from NOVA: "The Mystery of Animal Pathfinders" explores the migratorial exploits of monarch butterflies.

In this video from the Science and Technology Chat series, take a tour of a re-created Nevada gold mine to learn about mining techniques.

This video segment, adapted from NOVA scienceNOW, introduces the latest research on a system of neurons that plays a part in how people relate to each other.

In this video segment adapted from Hope in a Changing Climate, learn how an environmentally devastated ecosystem has been restored, benefiting both the local economy and global efforts to fight climate change.