Grolier
Three general encyclopedias: New Book of Knowledge, Grolier Multimedia, Encyclopedia Americana. Several reference sources: Amazing Animals of the World, America the Beautiful, Lands and Peoples, and The New Book of Popular Science.
CultureGrams
Reference source with information about countries, states, and provinces. Each geographic place has a traditional article, plus photos, videos and interviews. Articles are divided between Kids Edition and World Edition.
Wikipedia The largest and
most popular encyclopedia in the world.
Articles are written by multiple authors whose names are not disclosed, and
their expertise not known. Because of
this, it is not considered authoritative or acceptable for school
projects. Reading level is not
controlled.