Book excerpt: This book narrates two teachers’ experiences creating and leading an elementary after-school science program at a public housing authority. The narrative employs a reflexive ethnographic approach to examine the reflections of each teacher during one academic year. The book explores the teachers’ understandings of socially just teaching, their pedagogical transformations, and a vision of how science as a discipline was important in terms of enacting a culturally sustaining pedagogy. The reflexive ethnographic perspective enables consideration of the implications of teachers’ positionality in teaching science to marginalized and/or underrepresented students in informal learning contexts.