Info Please 
This site is for kids to get information.

Dictionary Online    
This site is for students to get to an online dictionary.

Thesaurus Online   
This is for students to get to an online thesaurus.

Fact Monster 
This site has many tabs for various subjects and also tabs for a dictionary, encyclopedia, thesaurus, almanac, atlas, and timelines.

Library of Congress     
The Library of Congress is an ideal site for research.