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Lesson study is a professional development approach. The concept of lesson study originated in Japan, where it is widely viewed as the foremost method of professional development for teachers (Fernandez and Yoshida, 2004)

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In lesson study, several instructors jointly design, teach, study, and refine an individual class lesson. Throughout the process they explore student learning problems and goals, examine their teaching practices, observe how students learn, and analyze how their instruction affects student learning and thinking. The purpose is NOT to develop a “perfect lesson,” but instead to better understand how students learn what we try to teach them, and to use that information to improve teaching and learning (Cerbin, 2011).

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