These image and audio sites provide content that is free to use. There is no cost and the content is provided with permission to use. These must still be cited so teachers know the source.
Website: http://search.creativecommons.org/
Website: http://freemusicarchive.org/
Free Android Phone app: https://play.google.com/store/apps/details?id=org.freemusicarchive.android
Free iPhone app: https://itunes.apple.com/us/app/fma/id691215777?mt=8&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/fma/id691215777?mt=8&at=10l6SU
Free Android Tablet app: https://play.google.com/store/apps/details?id=org.freemusicarchive.android
Website: http://www.royaltyfreemusic.com/
Website: http://soundbible.com/
Website: http://www.pics4learning.com/
Website: http://www.publicdomainpictures.net/
Website: http://commons.wikimedia.org/
Website: http://www.mediawiki.org/
Website: http://pixabay.com/
Website: http://www.public-domain-photos.com/
Website: http://www.morguefile.com/
Website: http://www.imageafter.com/