The document discusses the book "Drawing on the Right Side of the Brain" and how it teaches perceptual skills. It explains that the book has been revised multiple times to focus on different skills, like proportion and perspective. The goal is to train right-brain perceptual functions by having students do tasks that the left brain rejects, like drawing upside down. This allows the right brain to take over and develop skills like seeing edges, spaces, and relationships. The book teaches that basic drawing and reading skills both develop these same right-brain perceptual abilities. It provides strategies for engaging the right brain, like copying upside images or focusing on negative spaces, in order to improve perception.