The Biographical Dictionary contains tens of thousands of biographies, searchable by name, category and nationality.
Check out their Master Biographer Challenge game.
Biographies.net is a huge collection of biographies about famous and not-so-famous individuals, including facts, birthday information, life story, profession, family and more - collaboratively assembled by contributing editors. Browse the biographies by profession, alphabetically, or search by name or keywords.
Achievement is intended as an inspirational site – a few good people – with vignettes about and attributes of heroes.
This resource from the Society for Advancement of Chicanos/Hispanics and Native Americans in Science is an an online archive of first-person stories (autobiographies) by and about Chicano/Hispanic and Native American scientists with advanced degrees in science. Highly recommended.
Writing a personal biography (autobiography?) shows what it takes to compile such a document and how every biography is an edited version of the person's life.
An autobiography or a biography of a close friend or relative can make an interesting class assignment.
A&E's Biography Channel resources have been placed in digital format -- look at this database of more than 25,000 persons.
Alexis de Tocqueville's remarkable insights about the U.S. which have endured for more than a century have been recorded with a contemporary tour of the places he and his friend Beaumont visited.
This innovative twist may inspire your students to prepare other contrasting travelers' accounts.