This paper investigates how the processes of language transmission among speakers of Southern Tutchone ("dan k'e"), an indigenous Athapaskan language of the southern Yukon Territory, Canada, bear out an emerging theoretical interest in how bottom-up communicative practices shape language policy. An examination of "dan k'e" language practices illuminates how both fluent speakers and novices can actively create a speech community dedicated to the continued maintenance of their language. Drawing upon fieldwork conducted in an elementary school in Whitehorse, Yukon, I examine how language-teaching methods and language practices both inside and outside of the classroom function as ways to challenge the English-dominant speech community of the school. The shifting of linguistic frames in teaching, the addition of "dan k'e" to the school's linguistic landscape, and the introduction of speaking practices that reinforce the use of "dan k'e" all promote language use in a way that empowers speakers and encourages language maintenance. Exploring the agency of individual speakers and how their language practices both reproduce and challenge top-down policies reveals how speech communities can be shaped through the bottom-up planning of the speakers themselves. (Contains 1 table, 1 figure, and 10 notes.)