The COVID-19 pandemic caused unprecedented disruption to education around the world. There is much to learn from this period, to better understand what happened, to provide support to those affected, and to inform future responses to disruption. This research aimed to contribute to this field by recording teachers' experiences of teaching in the…

The National Research Council developed the concept of mathematical proficiency as being described by five strands: conceptual understanding, procedural fluency, strategic competency, adaptive reasoning, and productive disposition. The purpose of this study is to explore in-service mathematics teachers' perceptions of professional development…