I did this for the Illustration Friday topic this week - Teacher. Sadly I'm finishing it on Thursday night, so it won't see much time on the site as it resets every Friday.
Lotzi's pose was inspired by my time in history class. It was a general art history class - and even though I was quite interested in the topic, I made the mistake of scheduling the 8:00 class. And I've since become a morning person, I couldn't get up before 10 back then...well, I could, but I need frequent naps in class. I still ended up learning a lot, but it probably would have worked better if I was actually awake for more of the class...
I created this in Adobe Photoshop...starting with this sketch:
Then I solidified some of the lines and revised the drawing a bit:
And then it was just a matter of cleaning up the lines on a new layer and painting color and texture on a different layer.
Oh - and I had another teacher in junior college that insisted we always hold our writing implement - the reason was that if you're not holding your pen/pencil then you probably weren't going to take notes...or, at least, you were more inclined to take better notes if you were holding something to write it all down with...