Elegant and interesting the name of this "learning tool" is called Build Your Own Star. Use the star simulator to build your own star! You determine the fate of your star by setting initial characteristics. Then watch as its life story unfolds before your eyes. This interactive was developed by the Schlumberger Excellence in Educational Development group. Be sure to visit their other interactives at their Science Lab.  

This simple, but effective, "learning tool" comes to us from one of the premier science museums in the United States, the Exploratorium, in San Francisco. With this tool, students can see the relationship between time and the position of fossils in relation to the break-up of Pangaea. The tool is called Continental Divide: The Breakup of Pangaea. Students simple move the little red arrow.

Use this "learning tool" called Fossil Gallery to explore the history of life through fossils. Click on a group of fossils, select a geologic time period or use the menus below to begin. Use the help buttons for more information about taxonomic groupings. This wonderful site comes to us from the Paleontology Portal. 

Use this "learning tool" map, called Exploring Time and Space to explore the history of life through geologic time in North America. Click on the map or on the geologic time scale to begin. Or use the menus below to narrow your search. This wonderful site comes to us from the Paleontology Portal.
 

The goal of the PALEOMAP Project is to illustrate the plate tectonic development of the ocean basins and continents, as well as the changing distribution of land and sea during the past 1100 million years.

This "learning tool" is called Half-Life.  One of the most innovative science education companies is Explorelearning.com, they call their simulations, Gizmos. They are a subscription site, but they allow you to see this Gizmo for 5 minutes.   Shockwave is required.

Sky and Telescope's Interactive Sky Chart is a spectacular "learning tool". Whether you're in Greenland, Australia, or a small town in the U.S., simply plug your city into Sky & Telescope's Interactive Sky Chart and simulate a naked-eye view of the sky. Works from any location on earth, at any time of day or night, on any date from 1600 to 2400. Our link takes you to the main Sky and Telescope link, just scroll down near the bottom to find the Interactive Sky Chart. Worth the effort. An incredible tool!