In this article, we aim to deepen the knowledge on teachers’ action research as social learning in collaboration with a research-based PD leader. In this study, we follow two teachers conducting action research in a Swedish upper secondary school, in collaboration with a professional development (PD) leader who is also a doctoral student.

Llittle is known about implementing CT in the mathematical school curriculum, and many educational staff members have not been introduced to CT in their initial training. This article focuses on formative interventions applied in the form of Change Laboratory to implement digital artefacts with a particular interest with regard to educational staff’s expansive learning processes.