An interactive map that clearly shows the change in the status of slavery in territories from the Missouri Compromise to the Compromise of 1850. Click on the map to see the status before and after the Compromise of 1850.

Photographic history of landscape architecture. Includes many different categories for landscape architecture.

The life and work of the biochemist, peace activist, and proponent of Vitamin C's benefits, Linus Pauling, is put on display at this museum-quality site.

Statistics and general information about the volcanic moon of Jupiter. Good comparison, with graphics, of Io's volcanoes and Earthly geysers.

Here is a comparison of the atmospheric composition of Earth, Venus and Mars.

A comprehensive overview of the Manhattan Project, a research and development project initiated by President Roosevelt to produce nuclear weapons in World War II.

Learn about ergonomics and how it affects computer users. "Workstation Setup" has suggestions for teachers and students to think about as they work at computers.

A biography of explorer David Thompson is provided. Links for further reading are also listed. Lesson plans are for writing encyclopedia entries are provided (but are not specific to David Thompson).

The myths, mysteries, and facts are revealed at this Donner Party site. At the beginning of November 1846, a group of California-bound immigrants was trapped by snow in the Sierra Nevada. By the time the last member reached safety six...

Gives information on the Cascades and the states they are located in. Describes the Cascades as being a separate range from Sierra Nevada Mountains.

A great resource, containing career biography, timeline, and bibliography.

This site provides a timeline of the significant events in the life of Charles-Louis de Secondat, Baron de Montesquieu, author of "The Spirits of the Laws." There are also links to a bibliography.

Biography of Hume with notes on his major ideas and philosophy. Includes a timeline for quick reference.

This site presents the full text of Sir Thomas More's book "Utopia." Content is organized by chapter and a search feature is included.

This site allows you to find out about Machiavelli through an online biography, time line and a bibliography. Focus is on "The Prince" (with an online version) rather than his work as a playwright.

General biography centered on biographical information, including Descartes' works, writings, career, and influences. Content also includes a time-line of his life.

Good introductory biography with references to works, career, and influence. Contains a timeline for quick reference.

This study guide is a helpful tool for studying E.B. White's classic, Charlotte's Web. Background information about the story and play are provided, as well as lesson ideas.

Discover more about semicolon usage when you visit this informative resource. Students and teachers will benefit from the examples listed for semicolon use.

This site features a list of eleven simple rules for comma usage. Come and sharpen your grammar skills when you visit this educational resource.

Site discusses the four basic types of earthquake faults and shows what happens through animations. Offers links to earthquake data and information.

This is a site about barley that contains a list on the left with a link to a page about the North American Barley Genome Project.

Fairly detailed timeline of events in Rousseau's life. Includes personal information, education, and publication of major works.

Check out this site for global climate animations. "Get a feel for why we have seasonal weather changes or why other regions have different weather than you do."