FREEFOTO

http://www.freefoto.com/index.jsp



EDUPICS

http://edupics.com/



NRCS

http://photogallery.nrcs.usda.gov/Index.asp



OPENPHOTO

http://openphoto.net/



PICS4LEARNING

http://www.pics4learning.com/



FLICKR

http://www.flickr.com/creativecommons

Here are 2 flickr search tools that give you the thumbnail and all the attribution information
http://flickrcc.bluemountains.net/index.php
http://johnjohnston.name/flickrCC/

Flickr Storm http://www.zoo-m.com/flickr-storm/
allows the teacher to create a tray of images students can use without having them search on their own

Search Creative Commons with http://www.compfight.com

Dominic S. wiki with free images, free audio sites, and CC
http://nbasdcff.wikispaces.com/Open+Source+Links


You can also do a Google Advance search:

Google Images -- Advanced Image Search --Usage Rights -- Labeled for reuse