Library of Congress
Loc: Classroom Materials: Who's That Lady?
This site was designed as a video conference with the national First Ladies Library. It is an entire lesson that culminates in a competition where students try to identify recent first ladies based on their research.
A&E Television
History.com: American Presidents: William Mc Kinley
This easy-to-navigate site has Hoover's biography, events occurring during his presidency, an image gallery, and several video clips.