Image Sites

Classroom Clipart (over 58,000 searchable clip arts)
http://classroomclipart.com/

DK Clipart
http://www.dorlingkinderslev-uk.co.uk/static/cs/uk/11/clipart/home.html

Clipart for Kids

http://www.thekidzpage.com/freeclipart.htm

Discovery School's Clipart Gallery

http://school.discovery.com/clipart/

Pics 4 Learning

http://pics.tech4learning.com/

Kid's Image Searches

http://www.kidsclick.org/psearch.html

Educational Pictures

http://www.edupics.com/

Microsoft Media and Clipart Homepage

http://office.microsoft.com/clipart/default.aspx?lc=en-us