This is a very interesting thread indeed. Approximately ages ago when the earth's crust was cooling. I owned a retail art and framing business. I have years of having students or just graduates of art history, etc. working for me. Since I was the boss they had to listen even if they didn't agree with what I was telling them about preservation of art and framing in general. EVERY student that worked for me told me that they would never think of framing the same way and they had learned more about caring for art than any class they had taken. What's the point, well there is still a huge need to educate artists and art historians and probably those college professors and the way a thing is said means a lot. We don't frame to make the frame more important than the art. We frame to enhance the beauty of the art. In my shop I had customers drop off art to be framed and just call them when it was ready. I told them concerning those "white" mats that if color wasn't important then everything would be done in black & white. Don't be afraid to use color to enhance, and so long as the eye is drawn back to the art, the framing is a success. In a frame business you get plenty of work to frame that it's what you like or maybe even very good art, I thought it was my job to help the customer enjoy their art more by framing it well. This is my own method but this is how I decide in the simplest way possible if the thing I'm looking at is actually art...is doesn't matter if I personally like the piece. If I can walk right by it, it is wallpaper, but if I have to actually see the piece then is it art. I have also found that there is no one outside of this business (and some inside this business) who actually understand the vocabulary of this business. So I would suggest either a handout of something of that nature that you can go over with them and that they can refer to while you are teaching. I have done some of this at our local university as a guest speaker and I found the students/artists very receptive.