In June 2016, the Mastery Collaborative completed its first year as an official program, working with more than 40 public middle and high schools across the five boroughs of New York City to improve, document, and advocate for mastery-based teaching and learning. The collaborative has eight Living Lab schools that practice schoolwide mastery; most…

The transformation of a high school to a learning community is a slow and challenging process. This study tracked the efforts of teacher and administrative leaders from six high schools who worked to develop professional learning communities. Qualitative and quantitative analyses of interviews with school leaders revealed that the early days of…