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- Vol 6 RE: Chapter 8, App D
lesson studymathematics instructionteacher knowledgeprofessional learning communitiesresearch lessonsstudent thinkinginstructional resourcesevidence-based reflectionJournal article Evidence summaryAt a glance
Lewis, Perry, and Hurd propose a model explaining how lesson study can improve mathematics instruction and examine it against a North American case. Four features structure the process: investigation of curriculum, student thinking, and goals; collaborative planning; observation of a live research lesson; and reflection using evidence.
Key ideas
Improvement can occur through three pathways: changes in teachers’ knowledge and beliefs, development of professional community, and creation or refinement of teaching–learning resources. Better lesson plans are therefore only one possible product. The case provides an “auditable trail” connecting activities, teacher learning, collaboration, and instructional resources, illustrating how mechanisms may operate. Lesson study focuses attention on students’ responses to a carefully planned lesson rather than evaluating the teacher who delivers it, which can support shared inquiry and revision. The article presents theory and case evidence, not a controlled estimate of achievement effects.
Why it matters
Outcomes depend on access to content expertise, useful evidence, norms of observation, time, and repeated cycles. The model helps schools evaluate whether a lesson-study initiative changes professional knowledge and practice rather than merely completing meetings and producing a polished lesson.
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Edition abbreviations
- TE
- Teacher Edition
- PE
- Practice Edition
- RE
- Research Edition
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