Creative Commons licensed images.
Photos for Class is a free site that helps students find Creative Commons licensed images. The images that they download from Photos for Class come with attribution information embedded into the footer of the image. In the short video below I demonstrate how easy it is to find pictures through Photos for Class.
You can put the the Photos for Class search engine in your own blog or website. The video embedded below offers a demonstration of that process.
Disclosure: Photos for Class is owned by the same company that runs Storyboard That, an advertiser on this blog.