Primary+Source+Documents

[|FREE] (http://www.free.ed.gov).

FREE organizes more than 1,500 lesson plans, primary documents, science animations, math challenges, and works of art, literature, and music from the Library of Congress, Smithsonian Institution, National Archives, National Science Foundation, NASA, National Institutes of Health, National Gallery of Art, National Endowment for the Humanities, National Park Service, U.S. Geological Survey, National Oceanic and Atmospheric Administration, and other federal agencies.