So what can we do about it?
Well there are various sites you can use to find images that you can safely reuse. These images might be licensed under Creative Commons licenses (this post introduces these), or might even be Royalty-free (meaning you don't even have to attribute the author).
This tutorial from JISC Digital Media on Using the Internet for Image Searching is particularly useful as it goes through 4 stages of Judge, Discover, Tour, and Success (see image below); as well as their advice for Finding Video, Audio and Images Online.
|Image taken from jiscdigitalmedia: Finding Video, Audio & Images Online|
The latter of these examples suggests a number of sites for finding both collections of images specifically for Education (which appear particularly useful for historical images in all fields) as well as Creative Commons and other free collections. Some of these include;
I particularly like the ability to search multiple collections using the search feature from creativecommons.org, but you can easily check out the links to specific collections above, and don't forget you can also use Google's Advanced Search to find images suitably licensed - this short video shows you how you can filter the search....
As somewhat of an aside, concepts such as Creative Commons are directly associated to the Open Content Movement, allowing educators and self-learners to reuse existing content. This Introduction to the Open Content Movement will provide a useful starting point to understand the movement, along with this post introducing the Creative Commons licenses. You'll be reusing videos from MIT and Stanford in no time :-)
If you would like to discuss any of these points, feel free to get in touch.
This work by Peter Reed is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License.