Purdue University
Purdue Univ: Gases, Liquids, and Solids
This site has a brief description of the differences in particles in a gas, liquid, and solid. Animated microscopic pictures demonstrate the molecular movement in each state. Information is then summarized in an easy-to-read chart.
PBS
Pbs Learning Media: Pbs News Hour Classroom Collection
PBS NewsHour Classroom helps teachers and students identify the who, what, when, where, and why-it-matters of news stories. In partnership with PBS LearningMedia, we are proud to bring you Daily News Lessons which takes the best of the...
California Digital Library
Library of Congress: San Francisco's Chinatown: Outsiders Looking In
The Chinese in California, 1850-1925 illustrates nineteenth and early twentieth century Chinese immigration to California through about 8,000 images and pages of primary source materials. Included are photographs, original art, cartoons...