Copyright law protects images as stand-alone artistic works and that covers any work in a visual medium. This includes:
Images fall under one of three categories:
Under fair dealing you may copy a “short excerpt” of a work for research or educational purposes.
For images, a “short excerpt” includes:
If you are unsure whether an image qualifies as a “short excerpt”, consider other factors when deciding if copying is fair:
Under educational exceptions you may copy more than a “short excerpt” for the purposes of training or education.
When using an image under educational exceptions, the image must:
If the image fits the above rules, then you may use it in a lesson (such as a PowerPoint presentation) or in a test/exam.
Make sure you provide proper attribution (title, author, and source are listed).
If you want to use images but Fair Dealing does not meet your needs another option is to use those that are copyright-cleared or in the public domain. Verifying that an image is in the public domain could be difficult. Using tools that find images with Creative Commons licensing provides greater certainty. Here are some suggestions for finding Creative Commons images.
Creative Commons Search allows you to search across multiple websites for open images, video and music / audio. Websites include Flickr, Wikimedia Commons, Pixabay, and Google Images and Videos.
Search Google Images and select Settings > Advanced Search > Usage rights to find open images with the type of license that fits your requirements.
To find Creative Commons videos in YouTube that are licensed for modification, enter a search and go to Filters > Features > Creative Commons.
When you search flickr for images there is a Any license drop-down menu option that includes All creative commons.
Websites like Unsplash, Pixabay and Pexels offer high quality, stock photography-type images - and some videos - that do not require attribution and may be used commercially, shared by photographers under a CC0 (public domain) license.
Wikipedia and Wikimedia Commons offer a wide variety of images, as well as some videos and audio files. License terms of use vary.
The non-commercial user-generated content exception, a.k.a mashup exception, allows individual to use existing works in the creation of a new work, under certain conditions.