American Library Association (ALA) information on intellectual property, copyright, fair use laws, tools, and other resources. Handy information for librarians and teachers.
A very practical explanation of finding images that one is free to use via Creative Commons licenses via the image sharing site Flickr. Also included are concrete summaries of each specific license type. The author mistakenly refers to CC-licensed images as "non-copyrighted," but this is not accurate technically. A copyright owner may choose to license her work for reuse/remixing, but in doing so, she does not give up her copyright. Creative Commons exists with copyright not as an alternative to it.