Image Use for Educational Purposes: Utilizing Images for Educational Purposes

An excellent overview from the MIT Libraries

The Terms, Laws, and Ethics for Using Copyrighted Images

And excellent introduction to copyright, fair use, Creative Commons, and more

The Visual Resources Association has released its own code of best practices in fair use.

This tool is intended to assist the user in assessing the intellectual property status of a specific image. Understanding the presence or absence of rights in the
various aspects of a given image will allow the user to make informed
decisions regarding the intended educational uses of that image.

Some statistics and facts to help convince eLearning developers to should embrace visuals when creating their courses.