Your course looks good. I don't know that I would list the rule of thirds, but I might teach something about how there are patterns in what people see and appreciate, and how some of those patterns are often referred to as rules.
If you can get people to appreciate how some good photographs look and move people, and some of the ways to get there, you will have given value.
If you intend to survey the available photo editing offerings, don't ignore the freeware options (Fast Stone being an example) or some of the other competitors, like the Corel products I prefer.