PUBLIC DOMAIN RESOURCES -
Project Gutenberg: 60,000+ eBooks that can be downloaded (most are older works with expired copyright).
Metropolitan Museum of Art: includes more than 400,000 images from The Met collection.
Smithsonian Institution Public Domain Images: a collection of 3,000+ images housed on Flickr.
Librivox: public domain audiobooks that are read by volunteers from around the world.
Creative Commons Search database: Free stock photos with Creative Commons licensing and assistance for attribution
IMAGES -
Openclipart: More than 175,000 clipart images
Pexels: Free stock photos, royalty free images & videos shared by creators
Pics4Learning: Free photos for educational use
Pixabay: Free stock photos with Creative Commons licensing and assistance for attribution
Unsplash: Free photographs for projects
**Remember that you still must ALWAYS give credit & cite the
source, even with "free to use" images!
MUSIC
BBC Sound Effects: can be used for personal, educational or research purposes
Dig CC Mixter: Contains music for either free to use in non-commercial or commercial uses - check specifications for each recording
SoundBible: Download free sound effects and clips - some are in public domain, others are under Creative Commons licenses
Common Sense Education Digital Citizenship Curriculum grades 9-12
PBS Digital Citizenship lessons