It seems to me that American researchers are constantly seeking to explain how the child came to be what he is; we in the USSR are striving to discover not how the child came to be what he is, but how he can become what he not yet is. -A. N. Leontiev (cited in Cole, 1979) In this paper, we advance an approach to design research that is organized around a commitment to transforming the educational and social circumstances of members of non-dominant communities as a means of promoting social equity and learning. We refer to this approach as "social design experimentation" (Gutiérrez, 2008). This methodology developed over three decades in response to systems of education and learning that were failing immigrant youth, dual language learners, and youth from under-resourced schools and communities (Gutiérrez, Hunter, & Arzubiaga, 2009).