The Concord Consortium: How Do I Know if Something Is Positively or Negatively Charged?

Continents are on the move! An engaging lesson explains the acceptance of the idea of continental drift. The narrator of the It's Okay to Be Smart "Earth Science Videos!" installment considers the convincing evidence of the...

A diagram showing features of the seafloor and a laboratory experiment involving a model of the seafloor highlight this site. This is a good resource for teachers as well.

This video lesson explains how to know if a person is having a stroke. The FAST acronym is provided: face, arm, speech, and time. This information is intended for college students who are taking courses in the health and medical fields.

Learn about the direction of magnetic force with a very attractive interactive! Young physicists move a positively charged object around a negatively charged Van de Graaff generator and observe the direction of the forces present. A...

Learn how the code on a strand of DNA can be used to make a protein.

This video from Evolution focuses on one of the several lines of evidence for evolution -- fossils, highlighting the evolution of whales from land-dwelling mammals to the aquatic creatures we know today. [6:58]

Mr. Andersen illustrates and explains how all objects contain positive and negative charge. [5:24]

See how a breadboard electrical circuit works.

It seems like a simple process: we breathe in, our nose detects different scents, and our brain interprets the smell. But how does it actually work? How can something smell like vanilla to one person, but like urine to someone else?...

Just what do you know about genetics? The online resource contains 10 questions about genetics. Scholars work through the questions ranging from what DNA stands for to how much of human DNA is similar to that of a fruit fly. Scholars...