Getty Free Images
Search for an image. Then copy and paste it into your document. This is a free service for education.
Pics4Learning
This is a safe, free image library for education. Teachers and students can use the copyright-friendly photos & images for classrooms, multimedia projects, websites, videos, portfolios, or any projects in an educational setting.
Pixabay
With over 400,000 images, Pixabay is a huge repository for stunning public domain pictures. Use any Pixabay image without attribution in digital and printed form.
Library of Congress Prints and Photos
This site has over 1 million images on a wide variety of topics. Click here to find out about copyright and ownership of the images.
Smithsonian Institution
Over 1 million images, videos, sound clips and primary source media, all of which can be used if the information is cited appropriately. Find out how to cite the information here.
Photos for Class
This is an excellent source for properly attributed Creative Commons photos.