Some helpful sites for finding royalty free, creative commons licensed images:
-All of the images on this site are licensed for creative commons and educational use: https://pixabay.com/
-Flickr’s Creative Commons: https://www.flickr.com/commons (Make sure you are only searching creative commons!)
-The New York Public Library offers public domain images: http://www.nypl.org/research/collections/digital-collections/public-domain
-BYU Photo also has some options
You can also check out the following blog with more links to free, high-quality photo resources:
Check BYU’s Media Copyright guidelines for any questions regarding image use.