In this video adapted from Earth Island Institute, meet a high school student who educated her community about how a coal-burning power plant was contributing to asthma and other health problems there.

In this video adapted from Earth Island Institute's New Leaders Initiative, meet a high school student who worked to enact a state law to make cosmetics safer, after she learned they contained toxic chemicals linked to cancer.

This video from NASA explains the process by which gamma-ray flashes associated with storms produce matter/antimatter particle pairs.

In this lesson designed to enhance literacy skills, students learn that transitional fossils provide scientists with evidence to establish how major animal groups are related to one another.

This animation produced by WGBH and Digizyme, Inc. demonstrates the experimental technique used to introduce DNA plasmids inside bacterial cells, a process called bacterial transformation.

This video segment from Regents Review 2.0 uses a trigonometry equation to determine the height of a flagpole located in front of the school.

In this lesson designed to enhance literacy skills, students examine how to use fractions to measure and help conserve freshwater resources.

Using manipulatives, students figure out patterns in problems involving seating arrangements. They write algebraic equations to describe the relationships.

Students are introduced to algebraic expressions that use more than one variable and have multiple solutions. They figure out combinations of two items at different costs, with each combination adding up to 100.

This video adapted from the University of Leicester demonstrates the proper use of different-sized micropipettes to measure precise volumes of liquid in the lab.

In this lesson designed to enhance literacy skills, students examine our growing waste problem and learn about strategies we can use to lessen the strain on our landfills and Earth's natural resources: reduce, reuse, recycle.

Ever wonder how a battery works? This segment highlights voltaic cells, their various components and how they operate.

In this video segment adapted from the College of Menominee Nation, learn about the emergence of invasive forest species and diseases and their possible impact on the Menominee tribal forest.

In this video segment adapted from NOVA, learn about an experiment investigating whether liquid water on Earth could have resulted from a massive planetary impact billions of years ago.

In this video segment adapted from United Tribes Technical College, listen as six Native American students share their concerns, hopes, and knowledge about climate change.

In this video segment adapted from Haskell Indian Nations University, meet Elders who describe dramatic changes that they have witnessed in their local environments.