AC / DC: What's the Difference?

This animated essay from the American Experience Web site explains the difference between alternating and direct electric current and offers in-depth explanations about the role played by a battery, light bulb, wire, and generator.

Advances in Neurotechnology

In this video segment from Greater Boston, learn how a man with severe motor disabilities can operate a computer and move a prosthetic hand by simply thinking the commands, thanks to the combined efforts of bioengineers and neuroscientists.

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Aerodynamics: What Causes Lift?

How does an airplane stay aloft when upside down? This media-rich essay from the NOVA Web site offers an explanation based on Newton's third law of motion.

Agarose Gel Demos

Watch a "how-to" video on the proper technique of preparing an agarose gel for use in gel electrophoresis in this video segment from Austin Community College. A supplementary video shows the proper technique for pouring an agarose gel.

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Air Bag Design

Using automobile crash test footage, this video segment adapted from NOVA shows some of the challenges in designing the air bag.

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Airplanes: Designing for Stealth

Explore this NOVA interactive activity to see how engineers have modified a military plane's sound, shape, and heat emissions to minimize detection.

Air Power: Making a Hovercraft

In this video segment adapted from ZOOM, cast members make their own hovercraft and demonstrate how the air leaking out of a balloon can make a plastic plate hover above a table.

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Animal Cloning 101

Learn about clones and explore the methods scientists use to create clones in the lab in this interactive activity from the Dolan DNA Learning Center.

Arch Bridge

This video segment adapted from Building Big illustrates the strength of the arch in bridge design and construction.

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Ask an Engineer

Explore some of the wonders of modern engineering in this video from the Sciencenter in Ithaca, New York. Hear a diverse selection of engineers explain how things work.

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Associate Scientist Andres Berrio

In this video segment produced for Teachers' Domain, Andres Berrio, an associate scientist at Biogen Idec, discusses what he has done to succeed in the biotechnology field.

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Astronauts in Hard Hats

This media-rich series of interviews from the NOVA Web site explores the unique challenges faced by astronauts doing construction work in outer space.

ATE Internships and Co-ops

In this video adapted from ATETV, learn how Bristol Community College promotes internships and co-ops to prepare students for work in technology-related careers.

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Bandwidth and Data Conversion

This interactive activity adapted from the Wisconsin Online Resource Center describes the factors that affect the speed of data transfer in computer networking systems and some of the techniques used to increase the data capacity of these systems.

Bioengineering Body Parts

In this video segment adapted from NOVA scienceNOW, scientists discuss their attempts to grow human body parts in a jar.

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Biomanufacturing Supervisor

In this video adapted from Connecticut's College of Technology/Regional Center for Next Generation Manufacturing, hear firsthand about what it’s like to be a biomanufacturing supervisor, making products that help save people's lives.

Biomechanical Engineering

In this video from ThinkTV Dayton, a biomechanical engineer describes the way she uses engineering to help top-performing athletes.

Biomedical Technician Training

In this video adapted from ATETV, hear from a medical electronics engineering technology student about how she is improving her math, science, electronics, and communications skills in her community college program.

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Biotechnology Student Profile

Follow a high school student who is exploring the field of biotechnology by taking community college classes and job shadowing in this video segment adapted from Pathways to Technology.

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The Bridge Challenge

In this interactive activity from the Building Big Web site, use your knowledge of bridge design to match the right bridge to the right location in a fictitious city.