Produced by the National Schools Observatory, this PowerPoint workshop and accompanying flash animation explains tidal activity on Earth. The workshop takes the form of a PowerPoint presentation that explains why tides exist, why there are two tides each day and covers related topics such as spring/neap tides and...

From the Wellcome Trust, this animation shows how the human immune system attempts to contain a tuberculosis infection and how the bacteria are transmitted to new people.

Tuberculosis usually affects the respiratory...

This simulation can be used to explore pressure under and above water and see how pressure changes as you change fluids, gravity, container shapes, and volume.

Sample learning objectives include:

*Describe how pressure changes in air and water as a function of depth.

*Describe what variables...

In the simulation students can watch a string vibrate in slow motion. You can wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. The simulation also allows you to adjust the damping and tension.

Sample learning outcomes include:

*Discuss wave...

Produced by the Wellcome Trust, these resources include an interactive evolutionary tree and a video of the Tree of Life. These materials will help students to find out more about the work of Charles Darwin and evolution. The resources contain:

Tree of life video: The video is a short...

With this simulation students can test the pH of everyday liquids such as coffee, spit, and soap to determine whether each is acidic, basic, or neutral. They can also investigate how adding more of a liquid or diluting with water affects pH. Sample learning outcomes include:

• Determine if a solution is...