This study addresses the pressing need to recognize and include disenfranchised students within mathematics education in a way that incorporates the voices of their communities. We use the concept of boundary practices to point to the multiple ways in which the mathematics learning practices in a classroom connect or disconnect, include or exclude, adults as a resource for a culturally responsive pedagogy. Case studies developed through ethnographic methods of data collection allow an in-depth analysis and exploration of emergent themes. Our data suggest that the nature of the community of practice plays a critical role in establishing relationships with parents. Parental involvement is distributed and influenced by the nature and history of the community, as well as by the identities of the participants. Finally, our data indicate that a culturally relevant pedagogy facilitates an egalitarian dialogue with parents and between parents and children.