Every Stock Photo is a search engine for free, high quality, images that you can use in slideshows, videos, and in blog posts. Every Stock Photo has some search refinement options that distinguish it from other Public Domain and Creative Commons search tools. Under the advanced search menu on Every Stock Photo you can refine your search by license type, image source, image size (specify a range of pixel dimensions), and image shape.
Applications for Education
Every Stock Photo could be a good place for students to find images for use in their multimedia presentations.