The National Archives site, Our Documents, containing the 100 most important documents in American history.

The Open Video Project.  A shared digital video collection.

Have a go at the following geography applets from AAA:

Abbreviations of State Names

Locations of States

Map Identification of Nicknames of States - Multiple Choice

Nicknames and Capitals of States - Short Answer

Capitals and Names of States - Multiple Choice

Capitals and Names of States 2 - Multiple Choice 

Biography Website.  A searchable database of over 20,000 personalities both contemporary and historic.

The African Burial Ground.   As the city of New York has grown up, out, and over an increasingly vast area of land during the past few centuries, various sites of human activity
and habitation have become one of the many layers that continue to interest
urbanologists, sociologists, planners, and anthropologists. One such layer
is the African burial ground that was found in lower Manhattan in 1991, and
which has been celebrated by a diverse group of individuals ever since.

This folklore site contains retellings of American folktales, Native American myths and legends, tall tales, weather folklore and ghost stories from each and every one of the 50 United States. You can read about all sorts of famous characters like Paul Bunyan, Pecos Bill, Jesse James, Davy Crockett, Daniel Boone, and many more. So grab a cup of coffee or a soda, pull up a comfy chair, and stay awhile.