Based on the work of Lafayette Ron Hubbard, "Study: Wearing One's Hat" is the first-ever secular adaptation of the seminal (and controversial!) Study Technology-an easy, fun way to study any discipline with perfect retention. Although this work has no connection with the Church of Scientology, it is a faithful rendering of Hubbard's research papers and recorded lectures into book form. This book teaches the student how best to overcome the three barriers to learning: lack of 'mass', too steep a gradient, and the misunderstood word. It also teaches the student to use certain conceptual study tools, such as the Pyramid of Knowledge, and to be more relaxed when studying. This is also a text for teachers: it helps facilitate the use of Study Technology in the courseroom without it being a burden. The general aim of the course is that it provides an atmosphere of teamwork, where the student can study at his own pace, with the goal of becoming a professional who can apply what he has learned.