The aim of this mixed methods research study was to examine the construction of adolescents' bi-cultural identities through an exploration of their social practices on the social networking site, Ning. More specifically, we ask: (1) how are new Canadian and first-generation adolescents' bi-cultural identities shaped and performed as they use multimedia and social networking tools in their classroom; and (2) how can social networking tools help students cross cultural barriers and build strong communities of practice. In this paper, we share the findings of this research that examines how seventy-seven 11-12 year old students explored, negotiated and presented their bi-cultural identities while using a social networking site with their peers and teachers, and how this process contributed to the creation of a strong community of practice.