Creative Commons
Here are some links to great creative commons search sites.
http://www.pics4learning.com/
http://commons.wikimedia.org/wiki/Main_Page
http://search.creativecommons.org/
http://googlesystem.blogspot.com.au/2009/06/find-creative-commons-images-in-google.html
http://www.scoop.it/t/creative-commons-for-learners
http://www.youtube.com/user/tomcomau
http://www.pics4learning.com/
http://commons.wikimedia.org/wiki/Main_Page
http://search.creativecommons.org/
http://googlesystem.blogspot.com.au/2009/06/find-creative-commons-images-in-google.html
http://www.scoop.it/t/creative-commons-for-learners
http://www.youtube.com/user/tomcomau