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Dudley’s edited volume explains lesson study as a sustained form of professional learning in which teachers jointly identify a learning challenge, study relevant knowledge, plan a research lesson, observe selected pupils closely, analyse evidence, revise the lesson, and share what they learn.
Chapters connect the practice’s Japanese development with adaptations in the United Kingdom and other systems, review research, and examine leadership, curriculum development, initial teacher education, and support for pupils with specific needs. The focus is not on rating the teacher delivering the lesson but on making normally invisible relationships among teaching, pupil thinking, and learning available for collective inquiry. Case pupils, interviews, and detailed observation can challenge assumptions that ordinary classroom monitoring leaves intact. Effective implementation requires time, trust, knowledgeable facilitation, access to expertise, and ways to retain and circulate findings.
Lesson study is presented as disciplined, evidence-rich practice development, not simply collaborative lesson planning or a one-off demonstration lesson.
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Fujii examines lesson planning as the central investigative work of Japanese Lesson Study, with particular attention to selecting, designing, and adapting mathematical tasks. A research lesson begins from a long-term educational aim and a question about students’ present learning, not from importing a ready-made activity.
Teachers study curriculum and prior research, clarify the mathematical goal, anticipate multiple student responses and misconceptions, choose representations, plan questions and board work, and design how different ideas may be compared during the lesson. The written research lesson proposal records the rationale and predicted learning trajectory so observers can collect evidence about student thinking rather than evaluate the teacher superficially. Cases from Japanese primary schools show that apparently small changes in task wording or sequencing can alter the mathematics students encounter. Fujii cautions that Lesson Study transferred outside Japan can lose its substance when collaborative planning is compressed.
Productive adaptation preserves careful task research, anticipation, observation, and evidence-based revision.
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