Subtractive bilingualism is widespread throughout Siberia, with indigenous youth often more proficient in Russian than in their non-Russian local languages. Siberia's national schools, which are secondary schools offering instruction in local languages of Russia, provide critical institutional support for minority languages. The goal of this interdisciplinary regional study is to present an overview of national schools' development in two neighboring southern Siberian republics, Altai and Tyva, up to the present, and to evaluate the role of national schools' local language programs in promoting language vitality. The study examines a shift in priorities and challenges in local language education since 1991, the factors contributing to the shift, particularly federally-enacted educational reforms, and what has been done in these regions to meet these challenges. (Contains 2 tables and 16 notes.)