The stories in this book represent the efforts along the continuum of change including work that is just starting, to initiatives in progress, to examples of advanced implementation. Each story shares an approach addressing one or more of the four key recommendations from Catalyzing Change: Broaden the purposes of learning mathematics Create equitable structures in mathematics Implement equitable instruction Develop deep mathematical understanding These stories share efforts at the district and state levels as well as within schools and highlight the challenges and successes of implementing equitable teaching practices in classrooms everywhere.