(In Press). Teacher Learning in Lesson Study: what interaction-level discourse analysis revealed about how teachers utilised imagination, tacit knowledge of teaching and freshly gathered evidence of pupils learning, to develop their practice knowledge and so enhance their pupils' learning, Teaching and Teacher Education Article Teacher Learning in Lesson Study: what interaction-level discourse analysis revealed about how teachers utilised imagination, tacit knowledge of teaching and freshly gathered evidence of pupils learning, to develop their practice knowledge and so enhance their pupils' learning.

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PurposeThe purpose of this paper is to describe the development of Lesson Study (LS) in England through a Teaching and Learning Research Programme (TLRP) project – from early ideas, to a national pilot and national support from the National Strategies, a new labour government agency supporting improvement in educational standards.Design/methodology/approachThe paper describes the early development of LS in England as a process to improve teaching and learning and pupil progress in networks of schools and local authorities, between 2003 and 2006, going on to describe the entrance of LS onto the English national educational policy landscape in 2008.FindingsThe paper finds that LS has a place in the repertoire of teacher learning approaches and there is evidence that its use can improve teaching, learning and pupil learning outcomes in a range of school contexts. LS works successfully in a system that expects teachers and school leaders to improve professional knowledge and practice through systematic use of collaborative, enquiry based teacher learning approaches.Originality/valueThe paper provides some examples of the evidence of impact that Lesson Study has had on pupil learning outcomes.

In this article we review the evidence of the impact of lesson study on student learning, teacher development, teaching materials, curriculum, professional learning and system enhancement. We argue for lesson study to be treated holistically as a vehicle for development and improvement at classroom, school and system levels rather than as a curricular or pedagogical intervention. We illustrate the need for this approach to evaluating lesson study through a complex case exemplar which used Research Lesson Study (a form of lesson study popular in the UK and Europe) to develop learning, teaching, curriculum and local improvement capacity across schools initially involved in a two‐year mathematics curriculum development project that later evolved into three self‐sustaining, voluntary lesson study school hubs in London. We discuss resulting changes in culture, practice, belief, expectation and student learning. We argue as a result for greater policy level understanding of this expanded conception of lesson study as a vehicle in classroom, school and system transformation.

Against a backdrop of a transformation in teacher professional development and learning and state school organisation in England this century, this chapter describes a project which harnessed six cycles of Research Lesson Study at school and district level over two years to tailor the implementation of a new statutory curriculum in England to address the professional development needs of teachers and classroom learning needs of London students. It also reports the findings of research carried out during the project into how these teachers learned and developed this new curricular expertise and practiceknowledge through lesson study dialogues that supported student learning. It concludes by proposing future directions for teacher professional learning research and practice.