Worldbook Online gives you great information about lots of different things, including biographies. Use Worldbook Kids or Worldbook Student for the best results.
Ducksters has great information for kids about a lot of different people! You can search for your person by category or click on "Biographies Alphabetical" and find your person easily by last name.
Use RICAT, the library's catalog, to find biography books in the library. Type in the name of the person you want to search for and click on "Keyword" or "Title." If you need help finding a book, ask Ms. Tanner!