General information:
Encyclopedia Britannica Encyclopedia Britannica for middle school is a multi-disciplinary reference source that offers encyclopedia articles, primary sources, multimedia, as well as tools to guide you through the research process.
Biography in Context Offers reference content on a wide range of historically significant figures to present-day newsmakers. Entries also include magazine and journal articles, primary sources, videos, audio podcasts, and images for varied research
Daily Life Through History In Daily Life through History, students and researchers discover the everyday details about past eras that make historical accounts relevant and meaningful.
Middle School in Context Categories cover a range of the most-studied topics in middle school including cultures, government, people, U.S. and world history, literature, and many more. Includes videos, newspapers, magazines, primary sources, and much more.
US Specific
American History Offers a broad range of topics related to all aspects of American History.
American Indian Experience: The American Mosaic
The American Indian Experience is a digital resource that illuminates the histories and contemporary cultures of the Native peoples of North America.
US History in Context Offers comprehensive reference content on the significant people, events and topics in U.S. History.
Great as a primary source
New York Time Historical (1851-) Online, easily-searchable first-hand accounts and unparalleled coverage of the politics, society and events of the time.
If you hit a dead end, try the archives and historical society of the state your person is from. Many will have pages dedicated to famous persons from their states.