In mathematics education, the importance of activities is a central topic for both teachers and researchers. Despite a wealth of studies producing comprehensive theoretical insights from activity design to implementation, there remains a notable disconnect when it comes to applying these findings in actual classroom settings. This disparity underscores the necessity for an evaluation tool that is both grounded in theory and inherently practical, adept at revealing the intricacies of activity design and offering insightful feedback to practitioners. To address this demand, we undertook extensive research, leading to the development of a tool tailored to both evaluate and enhance the quality of activity design and its implementation. Its value? Both deeply theoretical and practically transformative. This book presents both a detailed framework and the evaluation tool, delving into theoretical bases, methodological approaches, and structural details. It serves as a valuable guide for practicing and prospective teachers, as well as for designers and researchers