Children who live in under-resourced communities and attend under-resourced schools deserve access to high-quality teachers and educational opportunities to support their success and well-being. This study emerged from a professional development (PD) for urban teachers working in such schools, to expand educational opportunities for elementary students through outdoor science teaching. Engaging frameworks of communities of practice (CoP) and critical pedagogy of place (CPP), this critical ethnographic study investigates how urban elementary teachers engage in discourse about critical issues of place. Additionally, the investigation seeks to understand how a CoP supports such discourse. The primary data for this study were multiple sets of researcher field notes collected from participant teachers during virtual spring and in-person summer PD. Over the course of the PD, participants shifted from viewing their outdoor teaching spaces with a deficit perspective to an asset-focused one. As they visited one another's teaching sites, the CoP the teachers were a part of created opportunity for discourse about social justice linked to issues of place within their particular school neighborhoods. The ability of urban elementary teachers to connect social justice to issues of place and to the teaching of science has implications for countering the injustice that characterizes many urban communities in the USA and elsewhere.