Since 2016, Park School in Denmark has consistently used Japanese lesson study as an approach to the professional development of its mathematics teachers. The school has moved beyond the initial adaptation of lesson study, and no longer includes external support. In this article, I investigate how three groups of teachers participated in the…

Professional development (PD) for mathematics teachers in China, especially in Shanghai, has received growing international attention. However, most of available research concerning Chinese PD has focused on successful practices, and far too little attention has been paid to less successfully organized PD practices, particularly for mathematics…

The EU-funded project "Supporting Mathematics and Science Teachers in Addressing Diversity and Promoting Fundamental Values" (MaSDiV) (2017-2020) promoted inquiry-based learning as a pedagogy that supports diverse and multicultural classrooms. This project included the design of a professional development (PD) programme for teachers.…

In this paper, I examine deficit talk, utterances that depict students and/or families based on their perceived deficits, in an equity-oriented professional development (PD) setting. Researchers often attribute deficit talk by mathematics teachers (MTs) to their biased beliefs and perceptions. From an interactional approach, namely conversation…

Facilitators of professional development (PD) for mathematics teachers currently gain increasing attention, as their practices are crucial for the success of spreading mathematics educational ideas and innovations into schools and strengthening the professional expertise of teachers. So far, mainly two components of facilitation have been…

Mathematics teaching in a 21st-century educational context requires a shift to active learning. The shift calls on teachers, and the plans countries need to prepare to make the changes through well-designed teacher professional development programs. ARPA (Spanish acronym for "Activating Problem Solving in Classrooms"), as a professional…

Social media is an increasingly prevalent informal learning site for mathematics teachers. These platforms offer an emotionally and philosophically supportive space for teachers who seek to address oppressive teaching practices within their school communities. In this paper, we examine interactions in a Facebook group with over 14,000 members to…

Studies of facilitators of professional development (PD) for mathematics teachers have been increasing in order to improve their preparation for conducting PD. However, specifications of what facilitators should learn often lack a conceptualization that captures facilitators' expertise for different PD content. In this article, we provide a…

Instruments designed to measure teachers' knowledge for teaching mathematics have been widely used to evaluate the impact of professional development and to investigate the role of teachers' knowledge in teaching and student learning. These instruments assess a mixture of content knowledge and pedagogical content knowledge. However, little…

Noticing is a skill that is not overtly observable yet is consequential to effective mathematics instruction. Researchers have found that prospective and practicing teachers can learn to notice, but little focus has been given to those who teach teachers to notice. The purpose of the study was to characterize mathematics teacher educators'…

This paper presents a discussion on a new focus area in mathematics teacher education, namely the mathematics teacher in shadow education (SE mathematics teacher). It addresses three issues pertaining to SE mathematics teachers: special knowledge and expertise they need to possess, teacher qualification and selection and SE mathematics teacher…

Online collaborative and content-focused professional development (PD) is becoming an increasingly important setting for supporting mathematics teachers' professional learning. The purpose of this study was to better understand the process by which a community emerges in such a PD setting by examining how the cohesiveness of 21 mathematics…

As content-specific educational coaches, elementary mathematics specialists (EMSs) have emerged as school-based professionals who are needs-driven and work closely with school stakeholders in regard to mathematics teaching and learning. While leading mathematics education organizations have identified the specialized knowledge and skills required…

This study compares web usage data with interviews from 41 participants, who are members of an online professional development site called the "Everyday Mathematics" Virtual Learning Community (VLC), to explore how elementary school teachers learn from classroom video. Web usage data reveal that the commentary surrounding video posted to…

This study examines how teachers' discourse moves influence patterns of authority in the mathematics classroom. We identify changes in authority structure in one classroom taught by a primary mathematics teacher in Hong Kong. This teacher participant was one of 32 who participated in a larger teacher-intervention study that aimed to help teachers…