|Visit GROLIER first!
Grolier will have loads of information for you, and it is completely reliable. You will likely find the best information from EA (Encyclopedia Americana) and GME (Grolier Multimedia Encyclopedia).
Don't worry about capitalization.
Do not use words like the, a or an.
Biography.com has a wealth of info for you
Visit S9.com Biographical Dictionary for quick bio overviews
Multnomah County Library has a great page of biography links
Library Spot also has many links for bios
Find famous people fast @ Who2?
The BBC has a fabulous Historic Figures section you should take a look at
Check out the "Dewey Browse" biography links
Infoplease: a reliable resource for biographical information
Search the Ask for Kids biography database
Biography Center is an easily searchable index of more than 18,000 biographies
Visit the Academy of Achievement : A Museum of Living History
Explore the White House page of presidential biographies
This is another fascinating page about the presidents
Looking for a scientist? Try Eric Weisstein's World of Scientific Biography