MAS Ultra - School Edition (EBSCO) This comprehensive database, designed specifically for high school libraries, contains full text for nearly 500 popular, high school magazines including America's Civil War, American Heritage, American History, American Visions, Archaeology, Astronomy, Bioscience, Careers + Colleges, Civil War Times Illustrated, CQ Weekly, Discover, Economist, History Today, Nation, National Review, New Republic, New Scientist, Popular Science, Science News, Scientific American, Smithsonian, World War II, etc. All full text articles are assigned a reading level indicator (Lexiles). Full text is also available for 88,000 biographies and 60,000 primary source documents. Additionally, MAS Ultra (School Edition) contains more than 540 pamphlets, nearly 150 reference books (including the Columbia Encyclopedia, the CIA World Fact Book and World Almanac + Book of Facts), an Image Collection of 91,000 photos, maps + flags, color PDF and expanded full text backfiles (back to 1975) for key magazines.