This study reviews the book Supervision that improves teaching and learning / strategies and techniques by Sullivan and Glanz, translated into Turkish by Ali Ünal. The review evaluates the book’s content and structure, emphasizing its practical contributions to educational supervision. Highlighting reflective practices, collaborative techniques, and alternative supervision models, the study presents the book as a valuable guide for teachers, school leaders, and educational researchers. It also underscores how the translation retains the original’s clarity and instructional tone, making it accessible for Turkish educators. By integrating theory with practical tools, this book contributes significantly to modern educational leadership and instructional improvement efforts.