The following resources will help you locate materials that you can use.

Digital Copyright Slider-interactive tool to quickly help determine if a work is protected by copyright.
http://librarycopyright.net/resources/digitalslider

Creative Commons Resources:
http://creativecommons.org/

search.creativecommons.org
http://search.creativecommons.org/

Websites for Creative Commons Music:

Jamend
http://www.jamendo.com

InCompeTech:
http://incompetech.com/m/c/royalty-free/

PublicDomainPictures.net – for free quality pictures & photographs and licensed for a small price:
http://www.publicdomainpictures.net/

Below are some online resources with information about copyright, fair use, and intellectual property.:

U. S. Copyright Office – link to the U.S. Copyright Office with information on laws and policies, obtaining copyright, searching for copyright various publications.
http://www.copyright.gov/

Copyright Clearance Center – Get copyright information. Get permission, verify coverage, more on copyright education.
http://www.copyright.com/

The TEACH Act – Roles, Rules and Responsibilities
http://www.copyright.com/Services/copyrightoncampus/basics/teach.html