"Documenting the American South (DocSouth) is a digital publishing initiative that provides Internet access to texts, images, and audio files related to southern history, literature, and culture. Currently DocSouth includes fourteen thematic collections of books, diaries, posters, artifacts, letters, oral history interviews, and songs." Sponsored by the University of North Carolina at Chapel Hill.
"This site allows you to search and view newspaper pages from 1860-1922 and find information about American newspapers published between 1690-present. Chronicling America is sponsored jointly by the National Endowment for the Humanities and the Library of Congress as part of the National Digital Newspaper Program (NDNP)."
The U.S. Department of Census presents extensive population, housing, economic, and geographic data. Quirky information includes such items as time spent commuting to work.
"The Digital Library offers a searchable database of detailed personal information about slaves, slaveholders, and free people of color...The site provides access to information gathered and analyzed over an eighteen-year period from petitions to southern legislatures and country courts filed between 1775 and 1867 in the fifteen slaveholding states in the United States and the District of Columbia."
Previously named FirstGov.gov, this portal opens to a staggering array of information about the United States. Pull down "Explore Topics" and/or "Audiences" to "Teens" for a plethora of choices.