I make posters. I have always made posters. I am in the process of scaling those down to fit on a single piece of paper. This way I can fit more on my walls and contain them easily. I am making them using a ruler, pencil, sharpie pen, and eraser. I may be insane (... in the membrane).
I am leaving them black and white so the students (or I) can color them after scanning a black and white copy. This is also my way of providing an example of how to manipulate the information in notes that you take. I still need some white out - you can see a few mistakes I need to clean up, and I have a couple of more drawings to add ... maybe ... after that "water strider" I don't know.