In “William Oughtred: A Great Seventeenth-Century Teacher of Mathematics,” Florian Cajori delves into the life and contributions of one of mathematics' most influential figures. Written with a blend of rigorous scholarship and accessible prose, the book explores Oughtred's innovative teaching methods, particularly his use of the slide rule and his seminal contributions to the field of mathematics during the seventeenth century. Cajori situates Oughtred within the broader context of the scientific revolution, illustrating how his work both impacted his contemporaries and paved the way for future advancements in mathematical thought. Florian Cajori, a distinguished historian of mathematics, was deeply passionate about the evolution of mathematical concepts and pedagogical techniques. His tenure as a professor of mathematics enriched his perspective, allowing him to appreciate the legacy of educators like Oughtred. Cajori'Äôs meticulous research and commitment to uncovering mathematical history are evident in this biography, as he interweaves historical narrative with a critical analysis of Oughtred's methodologies and their implications for modern education. This book is an essential read for educators, historians, and mathematics enthusiasts alike. Cajori not only honors Oughtred'Äôs legacy as a teacher but also invites readers to reflect critically on the nature of education in mathematics. Through this engaging biography, one gains insight not only into Oughtred's life but also into the evolution of pedagogical practices that continue to influence mathematics education today.