The thought I had in my mind which didn't articulate at all... and for that I'm sorry, is that I believe that too many people think they can simply make any digital capture "art" with Photoshop. As I understand the thinking, schools use film because it makes the student stop and think before hitting the shutter release. If you operate under the conditions imposed by the limitations of a 36 or 24 exposure roll of film with a limited range of ISO values, you are placed in a situation where you have to understand those limitations. By knowing the limitations imposed, you have to make decisions about how the image will render. It's this thought process that many people bypass with digital. I grant that there are many great photographers using digital. But they all learned somewhere about the visualization process that is required. I wonder how many learned that process through film? Finally I would bet that the use of film in many teaching situations allows an instructor to establish a common basis for comparison of the work being generated. For instance told to go photographer a given situation, with a specific film stock, process with this chemistry and print on this media, one could really push a classes ability to see the situation in unique ways. By using the same situation and varying one of the criteria, a new set of challenges is presented.
Anyway take the digression for what it's worth.
Chris