This video segment from FRONTLINE/NOVA: "What's Up with the Weather?" depicts research efforts to record Earth's past and present temperatures shifts. [4:39]

Students use spreadsheets to analyze the reasons why New Orleans has subsided in the past 250 years.

This informational text introduces students to the geographic uniqueness of the North and South Poles. The text is written at a grade four through grade five reading level. This version is a full-color PDF that can be printed, cut and folded to form a book. Each book contains color photographs and illustrations.

This informational text introduces students to the geographic uniqueness of the North and South Poles. The text is written at a grade four through grade five reading level. This is a PDF containing the informational text and a glossary.

Student teams use the engineering design process to create a useful product of their choice out of recyclable items and "trash." The class is given a "landfill" of reusable items, such as aluminum cans, cardboard, paper, juice boxes, chip bags, egg cartons, milk cartons, etc., and each group is allowed a limited amount of bonding materials, such as duct tape, hot glue and string. This activity addresses the importance of reuse and encourages students to look at ways they can reuse items they would otherwise throw away.

This informational text explores the relationships between tundra species: marsh marigolds, bot flies, and caribou. The text is at a reading level appropriate for second through third grade. It is a full-color pdf file that can be printed, cut, and folded to form a 2 1/8" by 2 3/4" book. It contains color photographs and illustrations and a glossary.

This informational text explores the relationships between various tundra species: marsh marigolds, bot flies, and caribou. The text is at a reading level appropriate for second through third grade. It is a pdf file that includes only the text and a glossary.

This informational text explores the relationships between various tundra species: marsh marigolds, bot flies, and caribou. The text is at a reading level appropriate for fourth through fifth grade. It is a full-color pdf file that can be printed, cut, and folded to form a 2 1/8" by 2 3/4" book. It contains color photographs and illustrations.

This informational text explores the relationships between various tundra species: marsh marigolds, bot flies, and caribou. The text is at a reading level appropriate for fourth through fifth grade. It is a pdf file that includes text and a glossary.

This informational text explores the relationships between various tundra species: marsh marigolds, bot flies, and caribou. The text is at a reading level appropriate for Kindergarten through first grade. It is a full-color pdf file that can be printed, cut, and folded to form a 2 1/8" by 2 3/4" book. It contains color photographs and illustrations.

This informational text explore how scientists are using robots to explore underwater mountain ranges in the Arctic Ocean. The difficulties associated with under ice exploration are explained. The text is written at a grade two through grade three reading level. This version is a full-color PDF that can be printed, cut and folded to form a book. Each book contains color photographs and illustrations.

This informational text explore how scientists are using robots to explore underwater mountain ranges in the Arctic Ocean. The difficulties associated with under ice exploration are explained. The text is written at a second grade through third grade reading level. This is a PDF containing the informational text.

This informational text explore how scientists are using robots to explore underwater mountain ranges in the Arctic Ocean. The difficulties associated with under ice exploration are explained. The text is written at a grade four through grade five reading level. This version is a full-color PDF that can be printed, cut and folded to form a book. Each book contains color photographs and illustrations.

This informational text explore how scientists are using robots to explore underwater mountain ranges in the Arctic Ocean. The difficulties associated with under ice exploration are explained. The text is written at a fourth through fifth grade reading level. This is a PDF containing the informational text.

This informational text explore how scientists are using robots to explore underwater mountain ranges in the Arctic Ocean. The difficulties associated with under ice exploration are explained. The text is written at a kindergarten through grade one reading level. This version is a full-color PDF that can be printed, cut and folded to form a book. Each book contains color photographs and illustrations.

The climate where you live is called regional climate. Global climate is a description of the climate of a planet as a whole, with all the regional differences averaged. Includes links to additional resources on climate and climate change.

This article examines the European Union's decision to join the Kyoto Treaty and the the scientific evidence that supports global warming.

U.S. History is designed to meet the scope and sequence requirements of most introductory courses. The text provides a balanced approach to U.S. history, considering the people, events, and ideas that have shaped the United States from both the top down (politics, economics, diplomacy) and bottom up (eyewitness accounts, lived experience). U.S. History covers key forces that form the American experience, with particular attention to issues of race, class, and gender.Senior Contributing AuthorsP. Scott Corbett, Ventura CollegeVolker Janssen, California State University, FullertonJohn M. Lund, Keene State CollegeTodd Pfannestiel, Clarion UniversityPaul Vickery, Oral Roberts UniversitySylvie Waskiewicz

U.S. History is designed for a two-semester American history sequence. It is traditional in coverage, following a roughly chronological outline, and using a balanced approach that includes political, economic, social, and cultural developments. At the same time, the book includes a number of innovative and interactive features designed to enhance student learning. Instructors can also customize the book, adapting it to the approach that works best in their classroom.