This video segment adapted from NOVA shows how Galileo used his telescope to carefully observe and study sunspots.

This illustrated timeline from the NOVA Web site turns back the clock to the late 1500's to relive the dramatic life of one of the world's most renowned scientists.

While all cells have a great deal in common, there is no end to the variation among them. These images provide a sense of the wondrous diversity found in the world of cells.

Gapminder collects hundreds of statistics related to global economic, health, and social development and analyzes the relationships between them across different countries and time (a few indicators go back to 1800).

This video segment from Between the Lions features the Knights of Blending Fields demonstrating an important element of phonemic awareness: blending word parts to make a word.

Read eleven of Roethke's poems. Read a list of his books, a biography, and a list of links to other sites.

A book about General Sherman, a giant sequoia tree in California that is over 2,000 years old. Includes audio narration in six additional languages with text in English.

This online lesson introduces students to many different approaches toward learning about rhyme and other similarities in words, such as shared/guided reading and small group instruction. A good tool for increasing students' phonological awareness through learning rhyme and word similarities.

Part of a series exploring the biotechnology of gene therapy. This section takes a look at some of the challenges faced in gene therapy and complications that have resulted during trial research.

The shared set of genes for body segments, possessed by all animals, are discussed in this video segment from Evolution: "Great Transformations."

This is a resource for students to use in their study of minerals. It begins with a general description that includes the list of essential characteristics of a "mineral." Minerals are then grouped alphabetically. Selecting a name provides large colorful pictures from the Smithsonian and a description. There are also special sections for Carbonates, Oxides, Sulfides and Sulfates, and Phosphates.

This resource offers images and descriptions of cultural landmarks, natural features,and cultural information of many foreign countries.

All you ever wanted to know about Argentina can be found here. Organized by quick fact charts or more detailed commentary, information includes geography, government, economy, climate, and more.

Much historical information and current facts about Bangladesh are given in this well organized and detailed site. Quick facts are displayed in easy to read charts.

Provides much general information and detailed facts about the sparsely populated Central American country of Belize.

Much historical information and current facts about Chile are given in this well organized and detailed site. Quick facts are displayed in easy to read charts.

Comprehensive site that gives you "Facts at a Glance" or more in-depth information about such topics as geography, people, economy, climate, or foreign relations.

It's easy to explore the Central American country of Costa Rica through "Facts at a Glance." Discover details about geography, culture, economy, government, and climate. Expanded information can be found in the commentary section.

Comprehensive site on Cuba that gives you "Facts at a Glance" or more in-depth information about such topics as geography, people, economy, climate, or foreign relations.

Much historical information and current facts about the Dominican Republic are given in this well organized and detailed site. Quick facts are displayed in easy to read charts.