Online Encyclopedias and tutoring services
Encyclopedia Britannica Academic Edition
Online encyclopedia for use in academic libraries
Encyclopedia Britannica Public Library Edition
Online encyclopedia for use in public libraries
Encyclopedia Britannica School Edition
Online encyclopedia for middle and high school students
Encyclopedia Smithsonian
Just like the Smithsonian Institution itself, this resource has everything. Provides bibliographies, curriculum ideas, and information on a wide range of topics.
Library of Congress: Portals to the World
Links to electronic resources from around the world. Organized alphabetically by country