Out-of-school programs can offer personalized and meaningful learning experiences that deepen students' knowledge and cater to their passions and interests, but it has been a painful reality that many such programs have been available only to students and families with privilege and resources. Karen Hammerness, Anna MacPherson, Preeti Gupta,…

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…