Alu is an example of a so-called 'jumping gene' - a transposable DNA sequence that reproduces "by copying itself and inserting into new chromosome locations." This animation from Cold Spring Harbor Laboratory's Dolan...

The Materials Science and Technology Teacher's Workshop (MAST) provides this lesson plan for students learning about concrete. The purpose of the activity is to "determine the density of a concrete sample and to learn...

Use of embryonic stem cells in research has been hotly debated for several years. This animation presents the basics on how stem cell lines are established. This animation from Cold Spring Harbor Laboratory's Dolan DNA...

This NSF funded site, at the University of Virginia, shows how semiconductors and transistors are constructed and work. This is a Virtual Science Lab that lets the users see how semiconductor crystals work and how they...

The Tabletop Explainer presents this video showing what you need, how to build an electric motor, and finally how it works. It is very simple, but can still be a challenging activity to students in a classroom or a...