Grolier Online Suite
http://auth.grolier.com/cgi-bin/authV2?bffs=N

• New Book of Knowledge - Reference and current events for elementary readers and up.
• Grolier Multimedia Encyclopedia - Quick reference and news for middle and high school.
• Encyclopedia Americana - Research and current events for middle school, high school and college.

World Book Online
http://www.worldbookonline.com/wb/Login?ed=wb

Every article from the 22-volume print set plus thousands more, with multimedia features, reviewed web sites and more.