Free Photographs and Clipartusage
Image: Salvatore Vuono /

Public domain images: typically up to 640 pixels are free (requiring attribution), higher res have small charge link back and attribution required link back or site credit required free for non-commercial use permission granted for use by teachers, students registration required. No attribution required. Commercial use allowed. >40 000 free textures

EduPic: Amazing collection: free for teachers and students. Free, unrestricted usage

Pixabay: Free, unrestricted usage. Watch for Shutterstock licensed content though. Thanks to @sig225 and @harryniezen for pointing out this resource site.

Microsoft clipart:


Free, royalty-free HD video backing clips/loops

TinEye Reverse Image Lookup: Forgot a source URL? Try TinEye.