Ookaboo provides almost one million images that are searchable by concepts. The pictures are licensed under various Creative Commons licenses or are public domain, and are free to use for educational and other non-commercial use. You can find more information about using the photos at http://about.ookaboo.com/a/. This site would be great to use for high school students in a variety of subjects: world history, U.S. history, biology and environmental science. It could also be used for middle school geography classes. The photos appear to be of very good quality, and the website is easy to use.

The Library of Congress: American Memory is an excellent source for a variety of resources, including images, video, and audio recordings. The resources are free, but be sure to check out its copyright notice at http://www.loc.gov/homepage/legal.html. This website would be useful in an 11th grade U.S. History class. While the site is a little hard to navigate at first because of the many resources available, it is an excellent way to incorporate Common Core standards with the many high quality primary resources.

Soundbible.com is an audio source that provides copyright free sound effects and clips. It also provides royalty free sounds at only .10 per sound. This site would be great to explore if teaching a 10th grade world history or 11th grade U.S. history class. (It has sounds from specific war weapons/planes, etc.) However, it can be used with many other grades and students of varying abilities. It offers nature sounds, animal sounds, etc. These sounds can be used in a PowerPoint or other presentation and the sounds offered are great quality. Be sure to read the following before using their photos: http://soundbible.com/about.php .