Creative Commons contains links to hundreds of sites containing content such as music, images, and videos that can be legally used and shared. The use requirements for each item is stated on its page. To access the site, click on the picture above.
Thousands of free images that are both searchable grouped by topic. Also contains lesson plans designed to "build creativity, communication, critical thinking, and problem-solving skills." To access the site, click on the picture above.
"Over 100,000 free clip art images, clipart, illustrations and photographs for every occasions. Over 2,000 clip art related categories."