Nettrekker http://middle.nettrekker.com/subject/
Pics 4 Learning http://pics.tech4learning.com/index.php
Best Collection of Webimages and Clipart http://www.clipartgallery.com/index.html
U.S Government Photos and Images http://www.usa.gov/Topics/Graphics.shtml
Student Research Center (Select Photos, Maps, & Flags) http://web.ebscohost.com/src/search?vid=1&hid=114&sid=02414697-dde4-42d0-b6da-ddf88181f29b%40sessionmgr102