ARC Data Online
http://www.arcdataonline.com/
ArcData Online is ESRI's Internet Mapping and Data Site. The site contains a wide range of geographic information that users can access to create map images and download data.

Canaan Valley Institute
http://www.nrac.wvu.edu/cvi_aex/aexhelp.htm
A one pager that shows the basic buttons/functions of ArcExplore

ESRI ArcExplorer software page
http://www.esri.com/software/arcexplorer/index.htm
Offers a brief introduction plus downloads. The page also has a link to a great PDF overview and demo: http://www.esri.com/software/arcexplorer/webae_slides.pdf

ESRI Virtual Campus
http://campus.esri.com/free/
ESRI's virtual campus. They have some valuable free GIS tutorials and it only takes a moment to set up a free account.

GIS FAQ Page
http://www.census.gov/ftp/pub/geo/www/faq-index.htm
Assorted, interesting information about GIS.

Idaho Geospatial Data Center
http://geolibrary.uidaho.edu/index.htm
This is an outstanding resource of geographic information in visual graphics, DLG, DRG, DEM, and Tiger. Use of the library requires downloading and installation of free GeoLibrary software. They also have an on-line tutorial that teaches you how to use this software.

Sooner City Web Site quick tutorial:
http://www.soonercity.ou.edu/tutorials/arc_explorer/walk1.htm
A quick and useful ArcExplorer tutorial.

USGS GIS Information Page
http://www.usgs.gov/research/gis/title.htm
Useful information for understanding the applicability and functionality of GIS.

Walter Hitschfeld Geographic Information Centre
http://www.geog.mcgill.ca/heeslib/giS.htm#gisweb
A wide variety of GIS resources.