This article offers insights into the challenges and complexities of accredited national professional learning programmes that are collaboratively designed, led, and delivered. The article is framed within theoretical perspectives concerning large-scale system change, highlighting the importance of inter-professional relationships and joint work…

We examine the effects of a year-long national-scale professional development (PD) program on mathematics instructional quality. In contrast to previous studies examining the effects of this program on instruction by comparing before and after participation or participants and non-participants, we examine whether instructional quality changed…