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The article presents the construction of a conceptual framework, which is rooted in mathematics education and in dialogic analysis. It aims to analyse how dialogic interactions contribute to constructing teachers' mathematical problem-solving knowledge. The article provides one example of this analysis.

The networking between a content analysis framework (Mathematical Knowledge for Teaching Problem-Solving) and a dialogic analysis framework (Lesson Study Dialogue Analysis) is presented. This leads to the construction of indicators to quantitatively and qualitatively code our data: five meetings during one lesson study cycle of a group of eight Swiss primary teachers, working on the teaching of problem-solving.

This article does not present empirical findings. The developed conceptual framework is the result presented.

The presented framework allows modelling, on the one hand, the knowledge relating to the teaching and learning of problem-solving and, on the other hand, the analysis of interactions during a lesson study. The article does not contain the results of the research.

The use of our framework can contribute to teacher educators' and facilitators' training by highlighting which types of intervention are favourable to the development of knowledge.

Our analysis involves a “systematic coding” approach. It allows a fine-grained analysis of the interactions in relation to the evolution of knowledge. Such a systematic approach offers the possibility of questioning the coded data in various ways.

The purpose of this poster is to present the new Lausanne Laboratory Lesson Study.

It stresses the links between six dimensions of this research center.

The poster provides a list of current researches and a list of publications.

This research center is the first about Lesson Study in French-speaking countries.

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.