The Library of Congress is the America’s oldest federal cultural institution and serves as the research arm of Congress. It is also the largest library in the world, with millions of books, recordings, photographs, maps and manuscripts in its collections.
2- The National Archives
This is another equally important website that provides a treasure trove of documents and resources on US history.
PBS has a wide range of resources for students from its various programs. The most useful is likely the companion Web sites for theAmerican Experience documentary series examining important events and people in American history.
EDSITEment offers a treasure trove for teachers, students, and parents searching for high-quality material on the Internet in the subject areas of literature and language arts, foreign languages, art and culture, and history and social studies.
5- The Smithsonian
Founded in 1846, the Smithsonian is the world’s largest museum and research complex, consisting of 19 museums and galleries, the National Zoological Park, and nine research facilities. It has a wide variety of exhibitions and collections on American history and culture. It also offers lesson plans searchable by grade level, type of resource and historical topic.