Some people refer to photos that have been edited as “images” and photos that have not been edited as “photographs”.  This specific language leads to a good question (in the world of easy access to user-friendly raster editing tools):

What is a photograph?

Discussions in this course often touch upon questions like this as we focus on building powerful visual end products.  We spent three classes using Photoshop and learning tricks to create images for powerful communication, a key component when using GIS maps to tell a story.  This year the students were free to identify their own specific area [photo editing] of interest to research.

The result:  a documented screen-captured video of the process that they took.  This was then posted to YouTube, for all to utilize and share.  Here is an example: Photoshop Tutorial: Changing the background.