“…Lesson Study (LS) is now widely recognised as a driver of teacher-led professional development in many education systems around the world (Lewis, 2002;Takashi and Yushida, 2004;Nakano, 2008;Robinson and Leikin, 2012;Eng-Lee and Mun Ling, 2013;Dudley, 2015;Akiba and Wilkinson, 2015;Hadfield and Jopling, 2016;Rappleye and Komatsu, 2017;Elliott, 2019). Recent research provides strong evidence that the LS structure of reflective cycles, collaborative teacher planning, focussed classroom observation and subsequent analysis are the foundation for reflective discussion, development and further planning (Prenger et al, 2017;Coenders and Verhoef, 2019;Elliott, 2019;Mayrhofer, 2019;Mynott, 2019;Vermunt et al, 2019). However, the precise mechanisms employed and the model of LS adopted varies depending on the ultimate purpose of using classroom focussed development of practice (Norwich, 2018;Takahashi and McDougal, 2019).…”