The City of Philadelphia has identified improving early literacy as a key civic priority. The goal is to support children's literacy development in school, at home, and in the community--regardless of where students live or attend school in Philadelphia. For this reason, civic efforts have sought to engage families, communities, and the city's public and private schools. From the public education sector, representatives from both traditional public schools and charter schools provide leadership for Read by 4th, the citywide campaign to promote grade-level reading by fourth grade. Charter schools enroll about one third of all public school students in Philadelphia, and more than half of Philadelphia's charter schools are independent. This study is an initial inquiry into the need and opportunity for cross-school professional learning for educators at Philadelphia charter schools. It focuses on independent charter schools that are not part of a charter management network. In the 2018 report, "Supporting Early Readers: A Scan of K-3 Literacy Practices in Philadelphia Charter Schools," representatives from nine independent charter schools reported that they could benefit from additional professional learning opportunities for implementing best practices in early literacy instruction. For the current study, the authors interviewed early literacy leader at the nine independent charter schools to describe how they use information and external professional learning resources to improve their early literacy programs. They also asked about factors that constrain their access to these professional learning resources, additional professional learning that would support early literacy instruction, and the conditions under which those resources would be most useful. [For the 2018 report, see ED613800.]