Permacharts' design team is staffed with graduate students from the University of Victoria, University of Waterloo, University of Western Ontario and Western University. Each guide is designed with one goal in mind: to give students the information they need to answer study guide questions in the most efficient and effective way possible. This mantra has served Permacharts well as they continue to grow and adapt their guides for each edition. This is easily the best study guide format out there, particularly for math and science, which are particularly difficult to cover in a one- or two-page format. In my experience, Permacharts study guides are the most effective study guides available at any price point, even over $10 or more.