Purpose: This study explored how teachers change, what teachers learn and how they learn during the implementation of project-based learning through lesson study. Design/methodology/approach: In this study, three university researchers, one doctoral student and six mathematics school teachers formed a lesson study team. Using a qualitative…

Purpose: The main purpose of this study was to explore how engaging in lesson study enhances secondary school mathematics teachers' pedagogical practice in lesson planning in Jimma, Ethiopia. Design/methodology/approach: The study employed a design-based research approach with qualitative and quantitative data collected from two secondary schools,…

Purpose: This research aims to understand the learning with regard to didactic knowledge of an early childhood teacher who participated in a Lesson Study (LS) on the topic of patterns, as well as her perspective about LS as a teacher education process. Design/methodology/approach: This is a qualitative case study of an early childhood teacher who…

Purpose: 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. Design/methodology/approach: The…

Purpose: This paper seeks to understand how teachers' mathematical knowledge for teaching (MKT) is developed during a lesson study regarded as a professional development process that places particular emphasis on teachers' knowledge of tasks, representations and students' learning. Design/methodology/approach: This study is based on the networking…

Purpose: The purpose of this study was to better understand how lesson study (LS) impacts the pedagogy and attitudes of teachers in varied sociocultural contexts. The authors investigated responses of teachers in Kenya and the USA who were new to LS. Design/methodology/approach: Teacher interviews after LS were qualitatively and inductively…

Purpose: This study aimed to explore how a group of Chinese primary mathematics teachers learned through conducting an online cross-cultural lesson study between China and Australia. Design/methodology/approach: An expansive learning theory was adopted to examine teachers' learning through collective activities across different activity systems.…

Purpose: The purpose of this study was to examine the digital competence displayed by a primary school teacher who implemented an interdisciplinary cross-border lesson that was designed with the lesson study methodology and involved two countries--Brazil and Chile. Design/methodology/approach: A qualitative methodology was adopted via the case…

Purpose: The purpose of this paper is to examine how lesson study can lead to teacher learning and improvement of instruction by developing teachers' mathematical-task knowledge and by supporting teachers' selection, modification, and implementation of mathematical tasks. Mathematical-task knowledge includes knowledge needed to use tasks that…