Creative Commons is a non-profit organization that promotes and enables the sharing of knowledge and creativity throughout the world. The organization produces and maintains a free suite of licensing tools to allow anyone to easily share, reuse, and remix materials with a fair "some rights reserved" approach to copyright.
http://creativecommons.ca/
Image Searching Using Creative Commons:
http://search.creativecommons.org/
Safe Searching with Google:
https://www.google.ca/preferences?hl=en-CA&fg=1
Usage Rights using Google:
(Choose the one that suits your needs. Better be safe and choose one that begins with "free to..."
https://www.google.ca/advanced_search?hl=en-CA&fg=1
http://creativecommons.ca/
Image Searching Using Creative Commons:
http://search.creativecommons.org/
Safe Searching with Google:
https://www.google.ca/preferences?hl=en-CA&fg=1
Usage Rights using Google:
(Choose the one that suits your needs. Better be safe and choose one that begins with "free to..."
https://www.google.ca/advanced_search?hl=en-CA&fg=1