Biography of Nicolaus Copernicus (1473-1543), the scientist who first put forward the theory that the Sun was the center of the universe.

This page deals with the composition of the earth's first atmosphere and how it has changed. Also the elements and percentages that make up our current atmosphere are listed.

A map of the United States at the close of the American Revolution showing the western land claims extending to the Mississippi River by the individual states after the Treaty of 1783 with Britain. The map shows the frontiers with the...

A map of eastern North America illustrating the Conquest of Canada and the War of Independence (1757-1783). The map shows major cities of the time, major river ways, topography and political boundaries. The map is color-coded to show the...

These tutorial explains what responsible citizenship looks like and ways individuals can contribute to their communities. A PDF file of the tutorial is available.

A defining resource for ribosomes to assist while studying cells. See an illustration of the structure and function in protein synthesis.

Identify the conditions required for natural selection and describe how it can result in changes in species over time. Follow Charles Darwin through a life of exploration, observation, and experimentation to see how he developed his ideas.

This is a map which shows the campaigns Andrew Jackson made into Florida to attack both the Seminoles and Spanish in 1818.

Check out the tutorial which introduces the Earth's spheres. Viewers should be able to identify the Geosphere, Biosphere, Atmosphere, Hydrosphere and Cryosphere and know their differences and similarities.

A program will help students determine differences and similarities of the structure and function of compound light microscopes, dissecting microscopes, scanning electron microscopes and transmitting electron microscopes.

This interactive will help students to identify the basic functions of the immune system. Recognize ways to distinguish between nonspecific and specific immune responses.

This article from the Florida State University provides an excellent explanation of WHY Hess's Law works and examples of how to use the law. Common mistakes are identified and explained.

Identify basic trends in the evolutionary history of humans, including walking upright, brain size, jaw size, and tool use.

This site features a clear picture of the plant cell with a concise explanation of its key parts and their functions.

A tutorial exploring the atmospheric blanket to show how the atmosphere supports life and insulates the Earth.

Discover the relative age of rocks by identifying sedimentary rock and observing its layers.