This video segment from IdahoPTV's D4K presents the types of rocks, how they are formed, what they are made of and how they are classified.

This interactive resource adapted from the National Park Service profiles rocky coast environments and describes how various geologic features form.

In this video segment from NOVA scienceNOW, meet researchers who are studying obesity and trying to understand the role that hormones and genetics can play in regulating appetite.

In this video adapted from the Encyclopedia of Physics Demonstrations, learn how plotting the changes in an object's position on a graph can provide information about the object's motion.

In this video from Science City, meet Romiya Glover, a chemist who develops products for HIV/AIDS testing. She describes the multidisciplinary nature of her job, how she decided to go into science, and how her work benefits others.

Learn how ravens benefit from sharing information and working together in this video segment from Nature.

Learn about root systems of trees in the Congaree Swamp National Park in this video segment from NatureScene.

Learn about rotational forces by watching astronaut Jeffrey Williams spin objects onboard the International Space Station in this interactive activity adapted from NASA.

This video segment from Nature takes viewers to a road race in Death Valley.

Astronomer Carl Sagan discusses the possibility of time travel in this audio-enhanced interview from the NOVAWeb site.

In this video segment adapted from Northwest Indian College, Lummi Elders explain how a decline in the availability of salmon reflects a threatened environment that must in some way be protected.

This animation adapted from NASA shows the orbital paths of spacecraft in NASA's Earth Observing Fleet that are a source of wide-scale, primary research about Earth.

Learn about the achievements of George Washington, Eleanor Roosevelt, Dr. Martin Luther King Jr., and Dolores Huerta by acting them out!

Sawyer, a student in history class, imagines himself hosting a talk show with guests George Washington, Eleanor Roosevelt, Dr. Martin Luther King Jr., and Dolores Huerta. When Sawyer interviews these historical figures about their achievements, the viewers act out phrases that represent each of their legacies.

Learning Objective:
Identify contributions of the historical figures George Washington, Eleanor Roosevelt, Dr. Martin Luther King Jr., and Dolores Huerta.

Observe what happens to an image when the scale changes. This interactive exercise focuses on visually comparing multiplicative and additive relationships.

This video from Thinkport introduces the seahorse, an unusual, endangered fish that has puzzled scientists who are attempting to save it.

In this video segment adapted from the College of Menominee Nation, tribal members share examples of how seasons are changing, and how these changes are affecting local plants.

In this lesson, based on the documentary Through My Eyes: The Charlie Kelman Story, students learn about the history and state-of-the-art of one of the world's most commonly performed surgical procedures--eye cataract removal and replacement.

Learn more about the Japanese form of poetry known as haiku. In this video segment from Poetry Everywhere, the poet Robert Hass reads a short collection of amusing, often ironic haiku by Japanese poet Kobayashi Issa.

This video segment adapted from Northwest Indian College reveals how Native American life and knowledge is connected to natural cycles.