Trying to find images for use in teaching can be time consuming. For this reason we recommend the following sources:
Britannica ImageQuest : The Library subscribes to this excellent database of millions of high-quaility images, all free to re-use for learning and teaching purposes within BGU provided a citation is included (for each image there is guidance on what the citation should say).
Pixabay, Pexels, and Unsplash are photo-sharing sites offering exclusively CC0 content (free, unrestricted use, no citation required). Although citations aren't necessary, it's good practice to acknowledge the use of CC0 content, just to make it clear that your work is copyright compliant: a statement such as "All images in this presentation are CC0" is sufficient for this purpose.
Flickr is a popular photo-sharing site. Some images cannot be re-used (any marked All rights reserved) but it's easy to filter these out from your search results to leave loads shared under Creative Commons licences - just be sure to correctly cite any you use, e.g. 'Rainbow by Photoboy, from Flickr under a CC BY-NC licence.'
Diigo : The above sites, and many others, are listed under the Images tag on the Library team's Diigo site. Check the ‘terms & conditions’ section on each website to ensure you correctly cite any images you use.
Top tip: When citing images it's fine to do so on a single page at the end of your document or presentation, provided you make it obvious which citation applies to which image. It's a way of staying copyright compliant without littering each page with citations.