Global Schoolnet
http://www.gsn.org

Places for kids, parents, and teachers; also includes listserv information--e-mail to keep you current. "The Global SchoolNet Foundation (GSN), a  nonprofit corporation, is a major contributor to the philosophy, design, culture and content of Internet-based learning."

CCV/Software educational software demos
http://www.ccvsoftware.com/

Great site for software site licenses, deals on software, and teacher created materials.

National Geographic Online
http://www.nationalgeographic.com/main.html

Internet Resource Directory for Educators 
http://www.tapr.org/~ird/

Internet University
http://www.caso.com/

Contains listings of 2,738 online courses from 83 accredited providers

The National Center for Education Statistics (NCES)
  http://nces.ed.gov/

The Purpose of the Center is to collect and report "...statistics and information showing the condition and progress of education in the United States and other nations in order to promote and accelerate the improvement of American education."