The Second Grade Elementary Framework for Science and Integrated Subjects, How Can Dams Change the Land Around Them, uses a local phenomena of impact of the Wanapum Dam on the Columbia River and a crack in that dam to understand erosion and changes in the landscape.

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.

Dope the semiconductor to create a diode. Watch the electrons change position and energy.

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

This interactive feature from the NOVA "Shark Attack!" Web site details the six senses sharks use to find and capture their prey.

In this Nature video, watch a battle between a loggerhead turtle and a shark.

In this video segment from Nature, see the value that sharks can have on the tourism industry in an area.

In this video from Science City, Shaundra Bryant Daily, an electrical engineer, describes a software program she developed to help girls reflect on their emotions, and how her two passionsí_í_íŹscience and danceí_í_íŹare connected.

In this video excerpt from NOVA, learn about the advantages, disadvantages, and ethical implications of screening for genes associated with diseases, including those linked to breast and ovarian cancers.

In this adapted ZOOM video segment, cast members calculate how much water they each use during a typical shower. They compare their results to their original predictions.

Background image of normal disc-shaped red blood cells from the University of Utah. Inset shows sickled red blood cells, curved and rigid, from the Virginia Medical College.

Why do the lights turn on in a room as soon as you flip a switch? Flip the switch and electrons slowly creep along a wire. The light turns on when the signal reaches it.

This video segment from IdahoPTV's D4K lists, describes and shows examples of the 6 simple machines and how they make work easier.

Amy Smith is an engineer who designs simple and inexpensive solutions to real-world problems. This video produced for Teachers' Domain features her innovative design for testing the safety of drinking water in the developing world.

In this video segment adapted from NOVA scienceNOW, learn about engineering innovations that could help detect a bridge's structural weaknesses before they become dangerous.

In this lesson designed to enhance literacy skills, students learn how animals' physical characteristics, such as jaw structure, are directly related to the function they perform when the animal interacts with its environment.

This video segment adapted from NOVA/FRONTLINE looks at American energy consumption and the resulting production of greenhouse gases.

In this video from DragonflyTV, follow the investigation of Isaac and Anjali as they record, measure, and analyze data about how the Sun's position in the sky affects a solar-powered car's speed.

What is a solar eclipse and why are they only visible in some parts of the world? In this video segment adapted from NASA, astronomer Susan Stolovy uses animations to provide an answer to these questions.

In this video segment adapted from ZOOM, cast members assemble a solar still and make fresh water from saltwater, demonstrating two steps of the water cycle, evaporation and condensation.