Learn about a study in which participants discovered contaminants in their homes, and how green chemistry may provide alternatives to such everyday toxins, in this video adapted from Contaminated Without Consent.

Metals are grouped according to their characteristics. This video segment uses the periodic table for an in-depth discussion.

In this video segment adapted from United Tribes Technical College, meet Native Americans who are concerned about climate change and believe that action today can help future generations once again live in harmony with Earth.

Learn why heart disease, a largely preventable condition, is the leading cause of death in this country today, in this video adapted from The Hidden Epidemic: Heart Disease in America.

Aaron and Justin investigate which sunscreen best keeps out harmful ultraviolet rays from the Sun, in this video from DragonflyTV.

In this video segment adapted from NOVA, explore the theory that small bits of gas and dust combined to form protoplanets billions of years ago, which in turn collided to create the four rocky planets of the inner solar system.

Students learn how the human body self-regulates to maintain a stable internal environment despite changes in the external environment.

Students investigate hominid evolution. They learn the difference between a relative and an ancestor, study the emergence of bipedalism, and chart patterns of hominid migration.

This video segment from The Human Spark features a discussion about how human thought differs from that of chimpanzees.

In this interactive activity adapted from Annenberg Learner's Teaching Math Grades 6–8, explore some of the ways graphs can represent mathematical data contained in a story.

Students use media resources and an in-class investigation to explore the types of energy within different types of systems. They also use the formulas for kinetic and potential energy to examine the path of a projectile.

In this video segment adapted from NOVA, a scientist explains the unexpected heat source fueling widespread volcanic activity on Io, a moon of Jupiter that many had previously assumed to be frozen.

In this video segment from Greater Boston, learn about conflicting theories regarding the cause of autism.

Through scientific research, this video from The Human Spark illustrates how a child’s views of what is right and wrong can be shaped by others.

In this video segment adapted from NOVA, scientists are startled to discover evidence for the three key ingredients for life on Saturn's moon Enceladus.

After their carts collide in a hardware store, two teachers discover that they both bought the same items in different quantities. With limited information, this segment demonstrates how to use an equation to determine the cost of each item.

Students practice using algebraic expressions by recording data from a video segment in which two staircases ascend at different rates. They record the patterns in two-column tables, draw line graphs and write simple algebraic relations.

In this interactive activity adapted from Annenberg Learner’s Teaching Math Grades 6–8, students interpret two line graphs to identify possible locations where the data might have been gathered.

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.

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