Open Education Resource Collections
Open Educational Resources Commons—includes resources suited for K-12
Wikimedia. A collection of projects sharing free-to-use media for education.
https://www.wikimedia.org/
BC Campus. Open Textbooks.
https://open.bccampus.ca/
Open School BC (free to use but not to copy or remix)
http://www.openschool.bc.ca/k12/oer.html
Saylor Foundation Free K-12 Common Core-aligned (US) Courses
http://www.saylor.org/educationlevels/k-12/
Open Source and Creative Commons Media Collections
Flickr Advanced Search. Find Creative Commons licensed images on Flickr.
http://www.flickr.com/search/advanced/
Public Domain Pictures
http://www.publicdomainpictures.net/
Morguefile.com – free photos, some restrictions
http://morguefile.com/
ImageAfter
http://www.imageafter.com/
FreeImages, royalty free stock images
http://www.freeimages.com
Open Clip Art Library. Public domain clip art.
http://openclipart.org/
PICOL. Open source icons.
http://picol.org/
WikiMedia Commons provides public domain and re-use licensed graphics, audio and video.
http://commons.wikimedia.org/wiki/Main_Page
FreeSound. Creative Commons licensed sounds.
http://www.freesound.org/
Jamendo. Royalty free music.
http://www.jamendo.com/en/
MaCaulay Libary. Archive of biodiversity audio and video (links but no downloads).
http://macaulaylibrary.org/
Free Music Archive – Creative Commons.
http://freemusicarchive.org/curator/creative_commons
Phlow Magazine. Creative Commons music.
http://phlow-magazine.com/
Last.fm – Creative Commons.
http://www.last.fm/music/+free-music-downloads/creative+commons
CCmixter – Creative Commons – check restrictions.
http://dig.ccmixter.org/
Internet Archive. Free video, audio and text resources – check for restrictions.
http://archive.org/
OpenStreetMap. Open source, world-wide streetmaps.
http://www.openstreetmap.org/
Creative Commons Search Tools
The Flickr advanced search page
Google’s advanced search page lets you restrict search results by Creative Commons licenses
The Creative Commons search page—you can use the tabs along the top of the Creative Commons search page to use a specific search engine such as Google, Yahoo!, Blip TV, etc.