Reference Websites

General Reference

Slimekids: School Library Media Kids includes games, book trailers, links to reference sites and more.

Almanacs

Fact Monster
Old Farmer's Almanac for Kids
SIRS Discoverer includes excerpts from 2009 World Almanac for Kids

Dictionaries

Merriam-Webster
Visual Dictionary
Idiom Dictionary
Dictionary.com
Yourdictionary.com
Oxford Reference Online (part of INFOhio, use INFOhio user name and password)