Maps

Atlapedia Online [ Kids/Teens/Mature Teens ] - Contains full color physical and political maps as well as key facts and statistics on countries of the world.
Capitals.com [ Kids/Teens/Mature Teens ] - Simple maps of countries around the world. Also includes basic facts about each country.
Color Landform Atlas of the United States [ Kids/Teens/Mature Teens ] - Maps include satellite information, 1895 state maps, and links to outside resources.
OSSHE Historic Atlas Resource Library [ Kids/Teens/Mature Teens ] - Includes maps of the ancient world as well as 18th- and 19th-century maps of the United States. Covers topics from the expansion of the Roman Empire to the journeys of Louis and Clark.
Xpeditions @ nationalgeographic.com [ Kids/Teens/Mature Teens ] - Nearly 600 National Geographic maps are just a click away. Each is available in printable .gif and .pdf formats.