The CyberSquad searches for HackerŒë_í_Œ_ castle based on a survey of where town residents have last seen him in this video from Cyberchase.

How can you pick up an ice cube with a string? Watch this video segment adapted from ZOOM to see how salt can help.

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.

In this Cyberchase video segment, the CyberSquad must locate each other using a map's grid to construct a coordinate system using letters and numbers.

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.

This video segment adapted from Texas Parks and Wildlife Department explores the role of the wetlands in our environment, including providing habitats for wildlife, acting as natural water filters, and playing a part in the greater water cycle.

Learn about different traits and adaptations in various species of hummingbirds in this video from Nature.

Take control of a virtual car and learn how vectors are used to represent velocity and acceleration in this interactive activity developed for Teachers' Domain. Grades 6-12.

In this ZOOM video segment, cast member Francesco follows the paper trail to find out what happens to his recyclables. He visits a material recovery center and learns how paper is recycled and the number of trees that are saved as a result.

In this adapted video segment, ZOOM guest Laura shows us some of the natural features of Yellowstone National Park, including geysers, hot springs, fumaroles, and mud pots, as well as some of the wildlife.

This interactive resource adapted from the National Park Service illustrates the difference between explosive and effusive volcanic eruptions as well as the hazards that can result, including lahars, tsunamis, and lava flows.

This interactive resource adapted from the National Park Service illustrates the variety of landforms and features created by volcanoes. Featured are calderas, craters, fumaroles and other geothermal features, igneous rocks, lava flows, lava tubes, and maars.

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

In this video segment from TV411, WNBA player Olympia Scott Richardson discusses her techniques for effective time management.

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.

This video segment adapted from Last Oasis explores the use of new dams as a way to provide or store water. In the 1990s, the city of Denver was looking for a new source of water for its growing population, and its plan to build a new dam suddenly became highly controversial.

In this video from Nature, learn about the erosive action of water on the Hawaiian landscape and human efforts to limit it.

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 ZOOM, visit a water treatment plant and learn how water from a local reservoir is turned into drinking water.