Beginning with a word-of-mouth reputation among medical students, the demand for Oklahoma Notes has grown steadily in the last twelve years. They are hands-on workbooks and study guides based on class-tested material, not dense textbooks. Each volume of the Oklahoma Notes is - a step-by-step review of the core information in its subject area; - organized in outline form for rapid learning; - loaded with dozens of self-assessment questions written in the formats used on the national licensure exams.