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The purpose of this paper is to report on how a grade level team in a Singapore primary school used lesson study to mediate the implementation of the English language national curriculum. It aims to explore how this process had mobilised different teachers’ knowledge, challenged their beliefs of teaching and student learning, and created impact on their learning and knowledge.

An interpretive qualitative study using a case study methodology was employed. Data collected included participant observations and individual interviews. Transcripts of lesson study discussions were open coded for the content of teacher discourse and the sources of influences on the teachers’ reasoning and action.

The findings indicate that each stage of the lesson process engaged teachers’ deliberative discourse differently and constituted their building a common inquiry stance into the problem of student learning in reading and writing, moving away from a lesson-based view to embracing a curriculum-based deliberation, and challenging their shared assumptions and enabling their learning to adopt the students’ lens in improving the research lesson.

This study provides an illustrative case on how teachers’ talk about work practices in lesson study mediated teacher learning in a group context. The study established the importance of an interconnected view of teacher interaction in lesson study that factored in the consideration of the influences at the teachers’ level and at the school’s level that enabled and/ or impeded a broader consideration of practice and richer conditions for the mentoring of novice teachers in the team.

The purpose of this paper is to examine how teachers engaged in curriculum deliberation through lesson study (LS) and how different types of teacher knowledge were elicited, co-constructed and transformed in integrated ways across LS stages. It also clarifies how different school-level orientations influence the nature, depth and scope of the deliberation.

The study adopted an interpretive qualitative case study approach involving two schools, employing participant observations of LS cycles and post-LS teacher interviews. Thematic analysis and analytical coding were conducted.

The two cases revealed core features of curriculum deliberation trajectories enabled by LS: problem identification, planning to unlock the educative potential of content and reflection on enactment for improvement. The types of teacher knowledge that informed deliberation on English language learning were uncovered to reveal LS teams' initial comprehension, collective reasoning and actions, and new knowledge derived. Pedagogical content knowledge was prominently drawn on in unlocking curriculum potential and transformed with the knowledge of student learning gained from the live lesson observations. The school-level orientations were found to influence the extent to which teachers can interrogate existing practices and co-construct knowledge.

The study offers a nuanced understanding of curriculum thinking in LS teams, which is enabled by processes that construct the dialogic space for coordinating curriculum commonplaces to transform content into pedagogical representations to cultivate students' future capacities. It highlights the importance of viewing sustainable LS from an interconnected perspective that calls attention to the social contexts of deliberation.

A first post-WALS attempt at a thematic analysis of the conference presentations since its first annual meeting in 2007, this paper aims to achieve two major purposes: first, to capture the trends of spread and diffusion of lesson and learning studies globally and second, to draw useful implications for future conferences.

A thematic analysis using NVIVO12.0 coding on all forms of conference presentations found in the WALS 2019 Conference Programme was conducted. Representative cases were selected from paper and symposiums sessions to support the claims generated from the analysis.

The study provides an evidence-based confirmation of the global spread and diffusion of lesson and learning studies. It uncovers findings key to the initial spread and continued diffusion; examines funding as a mechanism enabling university–school research relationships, models of adaptations and issues of sustainability; surfaces the theoretical models and methods adopted in paper and symposia presentations. The current situation, lessons learned and possible implications for future WALS conferences are discussed.

Inform research on practical cases.

Lessons learned are discussed.

These are possible implications for future WALS conferences.

The originality lies in its being the first WALS post-conference analysis aiming at identifying substantive themes with potential to draw important implications for future research and subsequent years' conferences.

Although CLS has been implemented in China for over a century, it is barely known to educators internationally. The purpose of this paper is to synthesize the salient characteristics of Chinese lesson study (CLS), introduce the major themes of this special issue, and invite dialogues about the theories and practices of CLS.

The authors of this editorial paper conducted an extensive literature review on CLS, analyzed the contents and methods of the existing research categorically, compared CLS with other models of LS globally, and present this special issue articles and their major contributions thematically. The theoretical framework of the paper relies mainly on cultural theories and theories on research paradigms such as improvement science, which explain why and how CLS functions in Chinese education system over time.

Existing studies suggest that CLS is a deliberate practice for developing instructional expertise, a research methodology for linking research and practice, and an improvement science for instruction and school improvement system wide. In addition to the theorization of CLS, this special issue also introduces some adaptations of CLS outside of China such as the USA and Italy.

This paper, for the first time, spells out some salient features of CLS, and discusses issues in adapting CLS in other parts of the world. It will enrich the understanding of LS theories and practices in China and promotes trans-cultural development of LS internationally.

This special issue reveals how lesson study in China continues to serve as a powerful platform to support change in teaching. The papers included in this issue explore how university faculty members and researchers support teachers to cross boundaries resulting from the introduction of key competencies-based (hexin suyang 核心素养) curriculum reform (KCR).

The theme of continuity and change is examined against the backdrop of Chinese lesson study's (CLS's) consistent supporting role in enabling curriculum reform. These analyses make use of concepts involved in understanding boundary crossing, such as using boundary objects and their roles, to help make sense of the new theories, tools, and resources as well as relationships engendered in responding to the reform's demand. While recognizing the continuity at play in Chinese LS, the authors use the lens of learning at the boundary of research-practice partnerships (RPPs) (Farrell et al., 2022) to contemplate the future of CLS.

The papers touch on three major themes: (1) the role of university-school partnerships in meeting the new demands of key competencies reform; (2) resourceful tools, strategies and structures to support boundary crossing for teachers; and (3) roles and relationships for mutual learning in university-school partnerships. Together these three themes, considered across the papers in this issue, point to the need to redefine CLS to engender versatility and hybridity and to enlist mutual learning relationships in future university-school partnerships. Such redefinition positions lesson study to both continue and change.

The papers in this issue are expected to promote mutualist learning in future CLS research-practice partnerships. To do so, research needs to move from focusing on change of a single case teacher to clarifying what experts and teachers each learn from the LS and from each other. Attention also needs to focus on the collaborative discourse and ways such discourse is able to promote mutual learning, emotional support in facing change as well as critical and constructive problem solving.

Practically, to better support boundary crossing, this special issue encourages academics and teachers to identify and work around boundary objects and their enabling features to enhance knowledge and identity of both university and teacher participants for more effective research-practice partnerships.

This special issue offers a pioneering set of studies that contributes to an in-depth understanding of how CLS is supporting the current competencies-based reform in China. It also provides concrete future directions for research and practice to enhance university-school partnerships' response to reform.

Lesson study (LS) is generally regarded as a pathway for teachers' professional development and a method for teachers' instructional research. LS has been regarded as having the potential to drive large-scale reform but little is known about how it does so from a district level. Therefore, this paper aims to reveal how lesson study promote district education reform.

This study offers an in-depth case study of how District Y of Shanghai, China, took LS as the primary method in promoting its District Project of Building Curriculum Leadership in Schools. By analyzing the key project documents and achievements in project promotion, and interviews with the major Project leaders at District and school levels, this study explored the practice and impact of LS as a tool to promote district reform.

In the District Project, LS has been a medium to address each individual school's real problems of practice and turn them into reform vision and reform will in alignment with District goals. Five levels of school curriculum texts have been planned, designed, translated, implemented, reflected on, updated and mutually adjusted systematically through LS to ensure consistency in transforming District reform vision into classroom practice. Different models of teaching-research community building were found in sampled project schools and professional expertise was built with district support to promote reform. The curriculum leadership development through LS has shaped reform leader schools and formed a collection of LS exemplars circulated in schools as high-quality curriculum packages, which laid the foundation for district-wide reform.

The innovative practice of LS in China's education reform has expanded its reach from within one classroom to the entire district curriculum system and made it an important tool to drive large-school district-based education reform.

Emerging research on education reform in Shanghai for the last decade or so has either focused on broad contexts and trends of the second-cycle curriculum reform or the professional development in response to the reform or a few detailed cases of teaching improvement to meet the reform demand. Little attention has been paid to how schools as institutions have been made to respond to and enact the reform. Through three detailed school cases, the purpose of this paper is to understand their distinctive responses to reform in terms of how they interpreted, enacted and sustained their reform efforts and how more importantly lesson-case study and multi-tiered research projects has become a reinvigorated form of Chinese lesson study and teaching research to significantly mediate the school’s curriculum reform efforts. Features of sustainable development behind these cases are conceptualized by Lave and Wenger’s notion of transparency of the mediating technology of a community of practice.

Drawing on master’s thesis reports of school leaders (2010-2016), school research publications and lesson cases as secondary data sources, an instrumental multi-case research design was adopted to build detailed case narratives and tease out cross-case comparisons.

Building on unique strengths and legacies to solve school problems, the three secondary schools responded to, enacted and sustained the reform in unique ways: case 1, a municipal key school, has focused on “three translations (of curriculum)” involving all teaching research groups (TRGs) in specifying broad curriculum standards and turning them into concrete, actionable designs and student tasks which are tested and refined through iterative cycles of lesson-case study, with the decision making for each translation informed by research projects studying problems arising. Case 2, a district key school, has capitalized on its strong TRGs and used research projects and lesson-case study to unite teaching, research and PD into a whole; and case 3, a regular neighborhood school, has aimed to build a structured PD system to tackle teacher stagnation by stressing the reflection components of each cycle of lesson-case study, challenging teachers to learn in the district-level curriculum integration experiment, and nudging them into their own research projects with well-staged support. In all the three cases, research projects have been networked connecting municipal, district, school and teachers in building a research climate. The lesson-case study has turned designs into refined actions to ensure quality of curriculum implementation and teacher growth.

This study yields insights into the inner workings of Shanghai’s recent curriculum reform. With strategic injection of research into the familiar institutional structures and organic cultural forms of collegiality, school innovations can be built on familiarity to create a sense of continuity, coherence and institutional identity so that teachers learn from doing with least disruption. The slow and steady work of sustaining innovations and reform goes beyond simple notions of scaling up and relies on building internal drive and institutional and teacher capacity for deep learning in responding to reform.

Teacher education and professional development have long been criticized for failing to induct and engage teachers in discourses of classroom deliberation. Lesson studies have contributed to an emerging discourse in which teachers come together to study classroom teaching to improve student learning. The purpose of this paper is to share knowledge about developing video resources to support this emerging discourse.

The authors showcase a digital hypermedia video case developed from research lessons on a third‐grade topic on division with remainder, conducted by teachers and researchers in a lesson study cycle in Singapore. Drawing on anchored instruction and knowledge points of the mathematics education discourse in China, the authors used embedded contexts, case‐based reasoning, critical incidents and facilitation as major design features.

A video documentary traces the research problem and how teachers learned to use the concrete‐pictorial‐abstract (CPA) model to improve teaching for student learning. Critical incidences are created to engage teachers in analyzing the research lessons by describing, interpreting and probing into the object of learning, student difficulties in learning, and how the teacher mediated the subject matter of teaching. A full range of lesson study data and related reading and web resources are provided in the video case to support training and self study.

The paper demonstrates the promise to capitalize on the curricular and pedagogical values of the rich video archives of lesson studies to support continued inquiry of teachers. It has important implications for addressing the issues of depth of implementation and sustainability arising from rapid spread of lesson studies in countries like Singapore.

The purpose of this paper is to report on an exploratory study, Project En-ELT (enhancing English language learning and teaching), which used lesson study to mediate curriculum innovation to enhance student learning by engaging teachers in learning and implementing effective English language teaching strategies and formative assessment practices in seven lower secondary schools in Singapore over two years. It aims to portray how lesson study can be adapted to build teacher pedagogical capacity in carrying out the language development goals formulated in the revised national English Language Syllabus 2010.

Project evaluation is embedded systematically into the research design from the very beginning of the pilot to in between each step of lesson study process across three consecutive cycles in order to evaluate the effectiveness of the pilot program from the project advisors’, participating teachers’ and students’ perspectives. Both the quantitative and qualitative data were collected in and across the instructional steps and lesson study cycles to create immediate evidence-based feedback to inform continuous on-going adjustment and improvement.

Findings indicate that across the three cycles the lesson study teams moved from isolated to collaborative planning; from poor understanding and mechanical execution of the retelling strategy to a more sophisticated and skilful use of reciprocal teaching. An increase was found in teacher confidence and positive attitude towards the value of the project in developing their language and teaching effectiveness. There was enhanced student engagement and collaborative participation in the lessons while assessment for learning was fostered in the classroom.

Program evaluation provided feedback loops to ensure that each enactment stage and cycle learns from and builds on the limitations and strengths of the previous one(s) so internal consistency, continuity and coherence can be achieved for concrete implementation; different perspectives from the project officers/researchers, teachers and students were collected consistently and analyzed to gauge the accuracy of the findings; the collaboration between Ministry of Education curriculum officers, specialists and teachers, through lesson study, was able to create democratic relations rested upon interdependence, and mutual respect and trust; and it provides an illustrative case of how lesson study can be used effectively to help schools carry out national curriculum and pedagogical innovations. The project has important implications for addressing the issues of implementation and sustainability of innovative curriculum practices.