The beautiful monarch butterfly is the focus of this elaborate site. Links to photos, video clips, cycle of life, seasonal charts, migration maps, and stories from Mexico are also included. Terrific site for students to explore!

Explore the elements of a story using the well-known Cinderella story as source material. Learn about setting, character, sequence, exposition, conflict, climax, and resolution.

The resource assesses students on British and metric conversions. There are tutorials on metric units, length, mass, volume, English units, symbols, and temperature. There is also an introduction and an interactive activity to test the...

The tutorial examines the rock cycle. Topics included are types of rocks, how rocks change, and a rock cycle diagram. There is also an introduction and an interactive activity to assess learners on concepts analyzed.

The resource explores the Earth. There are tutorials on plate tectonics, plates and boundaries, and the Earth's structure. There is also an introduction and an interactive activity to test the students on skills taught.

The resource explores the Earth. There are tutorials on plate tectonics, plates and boundaries, and the Earth's structure. There is also an introduction and an interactive activity to test the students on skills taught.

Columbus' arrival laid the basis for encounters between Europeans, Native Americans, and Africans. This unit examines how these contacts altered the way of life of peoples around the globe.

After the War of Independence, Americans were unable to agree on the form of their federal government. This unit explores how those conflicts played out as the new Republic defined its identity in relation to other nations.

This site highlights the westward expansion of settlers in North America and the effects this expansion had on Native Americans between the Revolutionary and Civil Wars.

Nineteenth century United States saw the creation of reform movements: temperance, abolition, school and prison reform, as well as others. This unit traces the emergence of reform movements instigated by the Second Great Awakening and...

A wonderful resource using primary and secondary source materials to explore many facets of the Civil War from the war itself to its impact on the home front. Includes video and text downloads.

This wonderful unit from Annenberg Media examines Reconstruction through three themes: reintegrating the former Confederate states in to the Union; the freedom of blacks and what that entailed socially and economically; and the economic...

Upper elementary, middle, and high school students can use this exhibit to get an understanding of how polls and elections are conducted. The discussion includes random samples, margins of error, and other concepts related to statistics.

Video presentation on combinatorics, or the "mathematics of counting complicated configurations." Offers several examples of combinatorics as used in real world situations and professions. [28:26]

What is topology? And how does this area of mathematics allow us to study the shape and interconnectedness of the universe we live in? Video presentation answers these questions via a lively presentation of discussion, examples, and...

A video presentation covering the history and evolution of statistics, as well as this area of math's link to our everyday world. View simple examples, including the application of statistics in the business world. [28:36]

Video program explains the difference between observation and experiment and the principles of experiment design. Lesson draws on real-life example of heart disease study and a double-blind experiment. [28:39]

Material to launch exploration of Earth's soil and its important role. View a one-hour video, accompanied by details on soil horizons and soil formation, and ideas for bringing this topic into the classroom.

A comprehensive resource on hummingbirds, organized into the following sections: "How to Track Hummingbird Migration," "Migration Updates," "All About Hummingbirds," "Lessons, Activities, and Information," "Challenge Questions," and "Ask...

Track the migration of whooping cranes, once on the verge of extinction. Follow new crane chicks from their hatching to the day they complete their first fall migration at 5 to 6 months of age.

A comprehensive presentation that answers a number of questions about frogs. In addition, this resource contains lessons and activities that can be used in the classroom. A general overview is given of migration and the annual cycle.

Video program showing how to use a scatter plot to illustrate relationship between response and explanatory variables, to determine patterns in variables, and to calculate least squares. Real-life examples -- manatee deaths per number of...

Video presentation on the probability of independent events, covering related topics: multiplication rule, random variable, and mean and standard deviation. [28:41]

Explore the different types of rocks on our Earth as you watch a one-hour video, accompanied by learning goals, details on sedimentary rocks, fossils, and supercontinents, and more.