Provides information about the Dust Bowl of the 1930s which occurred when the U.S. was stricken by a drought that caused devastating dust storms, primarily in the middle of the country. Includes primary source quotes, comments, and photographs.
Describes the life of the first U.S. president, George Washington, discussing his roles in the American Revolution and the creation of the U.S. government.
Presents a short study of how levers, wheels and axles, pulleys, inclined planes, wedges, and screws work, and the importance of these principles in various machines.
An interactive text that teaches the reader how to find one's way in cities and unpopulated areas with the use of maps, compasses, wind directions, cues from the sun, and other tools and techniques.
