I was just writing to a high school student about this sort of thing. Essentially, I was telling her to study drawing, painting, and art history as much as possible instead of only focusing on photography. The DWG, PTG, and AH will help to develop composition, sense of light, color, etc. and get them to think purposefully about it because they have to actually create it from scratch.
I see a lot of people migrating to photography because "it's fun" (and easy?). Mastering ISO, shutter speed, and aperture isn't the real challenge. It's being able to see the final image before you click the button.