Discovery's Clip Art http://school.discoveryeducation.com/clipart/
Dorling Kindersley Clip Art http://www.dorlingkindersley-uk.co.uk/static/cs/uk/11/clipart/index.html
Pic4Learning http://www.pics4learning.com/
More Clip Art! http://www.sbac.edu/~tpl/clipart/cliparthumbs.htm#05
Presidential Photos http://americanhistory.about.com/od/uspresidents/ig/Images-of-US-Presidents/
World Atlas Clip Art http://www.worldatlas.com/clipart.htm
Minnesota Reflections http://reflections.mndigital.org/index.php