Most of the time when we draw we start with a white sheet of paper and draw images on the paper using a pen or pencil. Now imagine doing just the opposite. Imagine starting with a black sheet of paper (or board or clay) and creating the image by scraping through the layer of black ink to reveal the white underlying layer. That medium is known as Scratchboard. This is one of my favorite Scratchboard images from high school. Oh, by the way, I got an "A" on this one.