A networked understanding of new mathematics teachers' learning, when participating in a lesson-study induction programme

Purpose The purpose of the article is to identify, describe and explain what and how new mathematics teachers learn when participating in a lesson-study induction programme, by networking theories. Design/methodology/approach To explore this phenomenon, the author combines the two theoretical frameworks, Patterns of Participation and the Knowledge Quartet. In a case study with one teacher, the latter framework is used as a zoom into the parts identified as important by the first framework. Findings The combination of the two frameworks proved productive as it provides: (1) a more complete insight into what the teacher learned, (2) complementary views on what and how the teacher learned and (3) different insights into the complex situations new teachers find themselves in. These findings contribute to the theorisation of lesson study and to research on new mathematics teachers. Research limitations/implications As the study includes only one teacher, its results regarding new teachers' learning are not generalisable to the same extent as are the results regarding the benefits of combining the two frameworks. Practical implications In Denmark and other western countries, it is crucial to provide new mathematics teachers with support that focuses specifically on mathematics education. The article proposes a design of such an induction programme based on lesson study. Originality/value Outside East Asia, lesson study is rarely used to support the professional development of new mathematics teachers during their first teaching years. The article contributes an exploration of this phenomenon in Denmark.