In this report, CPRE researchers explore how Common Core knowledge and influence are distributed inside of schools and how these configurations may help teachers to engage with the Common Core and influence their understanding and implementation. To do so, we used a mixed-method approach to examine knowledge and influence in eight schools, including five elementary schools and three middle schools. Our central method was a survey of knowledge and influence of all faculty members in a sample of eight schools. These data are supplemented with interview data from a purposeful sample of teachers and administrators in the eight schools. Sponsored by the General Electric Foundation, which also provides support to New York City through its Developing FuturesTM in Education Program, the Consortium for Policy Research in Education (CPRE) at the University of Pennsylvania has examined Common Core implementation in New York City in a series of studies. In 2013 CPRE released the findings of two investigations, one which described how the district constructed the 2011-12 Citywide Instructional Expectations (CIEs) for teachers, which were a small number of assignments for school faculties to complete during the school year to facilitate their engagement with the new Common Core (Supovitz, 2013). The second report examined how a diverse sample of 16 schools understood and implemented these CIEs and how their choices influenced their levels of engagement (Goldsworthy, Supovitz, & Riggan, 2013). A third report is a companion to the current report, focusing on teacher collaboration as a means of cultivating and transferring knowledge about the Common Core.