Discovery Education Clipart: http://school.discoveryeducation.com/clipart/

Discovery Education: http://streaming.discoveryeducation.com/

Pics4Learning: http://pics4learning.com/

Safari Montage: http://www.safarimontage.com/

Animation Library: http://www.animationlibrary.com/

Richard Byrne's List of Copyright-friendly Image Resources: https://sites.google.com/site/richardbyrnepdsite/copyright

Music
Freeplaymusic :
http://freeplaymusic.com/

Discovery Education: http://streaming.discoveryeducation.com/

These and other image resources can also be located at Hempfield's Images wiki at http://images.wiki.hempfieldsd.org/