MAS Ultra - School Edition This link opens in a new windowThis comprehensive database contains full text for top high-school magazines including America's Civil War, American Heritage, American History, Archaeology, Astronomy, Bioscience, Careers & Colleges, Civil War Times, Congressional Digest, Discover, History Today, Nation, National Review, New Republic, New Scientist, Popular Science, Science News, Scientific American, Smithsonian, World War II and much more. All full-text articles are assigned a reading level indicator (Lexiles).