The “Ontario Teachers' Manuals: Nature Study” serves as a pivotal resource for educators aiming to impart knowledge about the natural world. This comprehensive guide combines scientific observations with practical teaching strategies, reflecting the early 20th-century educational reforms that emphasized experiential learning. Written with clarity and precision, the manual employs a straightforward yet engaging literary style, designed to make the complexities of nature accessible to both teachers and students. With a careful selection of activities, illustrations, and suggestions for classroom exploration, it positions nature study not merely as a subject, but as a vital part of holistic education in the formative years. Authored by the Ontario Department of Education, this manual is a product of a time when there was increasing recognition of the importance of nature in the curriculum, propelled by the burgeoning environmental consciousness. The department'Äôs commitment to fostering a well-rounded educational system is evident in this text. By grounding lessons in observable phenomena and encouraging active participation, the authors sought to cultivate a sense of curiosity and appreciation for the environment among young learners. For educators, ecological enthusiasts, and historians of education alike, “Ontario Teachers' Manuals: Nature Study” is an invaluable tool. It provides not only instructional insights but also a window into the educational practices and philosophies of its era. As such, it deserves a place on the shelf of anyone interested in the intersection of pedagogy and environmental awareness.