Library of Congress http://www.loc.gov/index.html
Beyond Google http://toolsforsearch.wikispaces.com/
International Society for Technology in Education http://www.iste.org/
PUMAS (Practical Uses of Math and Science) http://pumas.jpl.nasa.gov/
Web Resources for Teachers http://www.deweybrowse.org/Teacher_Resources.html
EdSitement (National Endowment for the Arts) http://edsitement.neh.gov/
PBS: Standards-based resources (Includes online professional development opportunities) http://www.pbs.org/teachers/
The Big6 : Information skills for students http://www.big6.com
Virtual Tours http://www.educationworld.com/a_tech/sites/sites083.shtml
http://www.educationworld.com/a_tech/tech/tech071.shtml