Chandra allows astronomers to view our galaxy and beyond in ways only dreamt of before. 14 interactive flash features are offered in this exciting look at cosmic phenomena.

Students perform many inquiry activities related to Earth's orbit. Included are recording daily temperatures, observing the sun's path over several weeks, tracking sunrise and sunset times, and angle of sunlight. Diagrams make lessons easy to follow.

Plenty of cool activities about the Earth's rotation can be found here, such as tracing shadows, observing shadows during different times of the day, and tracking the sun's path in the sky to understand the rotation of the earth.

Superbly written explanation of thesis development. Use the links on the right to work through the writing process.

This public health resource provides information on carbohydrates. Very in-depth, discussing what carbohydrates are, how they work, and popular diets related to carbohydrates.

This resource teaches how to write a conclusion for an essay. Also includes a few pointers on how not to end one.

This resource explains how to write an essay. Provides information regarding length, order, and opening strategies. W.9-10.1a claims/intro/org

Find books, pamphlets, photographs, maps, and manuscripts about immigration to the United States, principally nineteenth-century immigration. With a timeline of key dates in U.S. immigration history and a browsable list of search themes that highlight portions of the collection related to the Chinese Exclusion Act, the gold rush, Scandinavian immigration, and the settlement house movement.

This interactive test allows you to explore your unconscious preferences and beliefs through a series of questions. The site also contains related material on examining your unconscious. Your browser must support Java Applets.

These hands-on activities are a great way for students to gain perspective on the relative sizes and distances of each planet, the relationship between the sun and Earth, and much more.

This site explores black holes in an easy-to-understand format. Answers such quesitons as, "What are black holes?" and "Do black holes really exist?"