Here are some samples of demos for students in the Elements of Digital Painting course that I teach. Students are thrown into Photoshop and assigned with the task of completing material studies on cubes. Each week bring a new challenge in the form of different materials. I log my demos as YouTube videos, and give the class the layered PSD files in order to follow along and breakdown my process.
Feedback is another valuable aspect of art education, and I make it a priority to log important feedback in a layered PSD that students can download and open up. Paintovers are an essential part of the learning process, so I have included a few examples below.