In areas with an insufficient supply of qualified teachers, delivering instruction through technology may be a solution to provide education. This paper analyzes the educational and labor market impacts of an expansion of junior secondary education in Mexico through schools using televised lessons, the telesecundarias. Exploiting their staggered rollout from 1968 to 2000, I show that for every additional telesecundaria per 50 children, ten students enroll in junior secondary education. I find that an additional year of education increases long-run income by 12.5–13.9%, driven partly by increased labor force participation and a shift away from agriculture and the informal sector.