This book delves into how Japanese schools evaluate and enhance education quality through lesson study, curriculum management, and school self-evaluation. It explores the concept of "understanding by design" in the context of the historical background and the challenges of the present, providing practical methods of educational evaluation for the future. Through in-depth case studies of two primary schools, readers gain a comprehensive understanding of educational evaluation and improvement. The book proposes a new theoretical framework for a comprehensive quality care process that links lesson study, curriculum management, and school evaluation. Based on authentic assessment, the strategies and examples presented can be applied to any quality system. The conclusion offers core ideas for successful implementation of educational evaluation and improvement. This book is essential reading for teachers and school leaders seeking to build their schools' quality systems, and for researchers and graduate students interested in improving educational evaluation.