This paper lays out a theory of (re-)generative learning to explain how families and communities socialize young learners into thinking like scientists and mathematicians. Cultural communities and their families orient their young in varied ways toward the language, behaviors, and self-theories about the future presupposed in the learning of science and mathematics. Certain socialization processes and norms correspond closely with those that scientists and artists use in laboratories, studios, and rehearsals. Certain norms of politeness and patterns of language differ significantly from habits