Lesson study is a teacher-led professional development model where a group of classroom teachers work collaboratively to plan and design a lesson and study student learning by systematic inquiry. In lesson study, teachers are engaged in critical, creative, and collaborative work in developing and researching a lesson through a “design-implement-reflect-revise” cycle until it reaches a form which they believe is exemplary. The main goal is not to develop a ‘perfect’ lesson but to make the development of an exemplary lesson a context for studying student learning. Since 2006, UP NISMED has been actively promoting lesson study as a model of professional development for mathematics and science teachers.
Lesson study started in Japan in 1872 and since then has been the primary professional development activity of their teachers. Lesson study is now becoming popular among the teachers in the US as well as in other countries. For instance, the World Association of Lesson Study (WALS), which attracts participants from all over the world, has been holding an annual conference on lesson study since 2007. The Asia Pacific Economic Cooperation (APEC) has also been holding international conferences and symposia for promoting lesson study especially in the Asia-Pacific Region. – Erlina R. Ronda