"How did the slavery system undermine the United States' democratic principles?" This question launches a study of how the Preamble to the Declaration of Independence, Article I, Section 2 of the U.S. Constitution, and Article IV,...

Students explore the Ice Age. In this geology and social studies lesson, students read the book Eyewitness Books Early Humans and create a KWL chart about the Ice Age. Students locate Asia and North America on the World Map and...

Go on a traveling adventure throughout Australia, Oceana, and Antarctica! This textbook excerpt offers a full unit of study that can easily be supplemented by extra projects or research materials. Learners study maps, read about...

MacGillivray Freeman's film Arabia presents viewers with remarkable images and insights into this ancient and mysterious land. An educator's guide is designed to provided teachers with the materials they need to support a...

The final installment of a 22-part American history series examines the many faces that make up the country's story. From Henry Ford to Tulio Serrano, scholars use biographical evidence and Internet research to uncover the people behind...

Students discover how psychologists complete their research on different topics. In groups, they describe the elements of an experiment and the importance of sampling during research. They identify ethical issues in their research and...

Students learn about complex networks and how to use graphs to represent them. They also learn that graph theory is a useful part of mathematics for studying complex networks in diverse applications of science and engineering, including...

Kim Preshoff explains how using a visual tool called a population pyramid helps policymakers and social scientists make sense of the statistics, using three different countries' pyramids as examples. [5:01]

The NOVA documentary, The Cannabis Question, explores the story of cannabis from the criminalization that has disproportionately harmed communities of color to the latest medical understanding of the plant. What risks does cannabis pose...