This paper examines the medium-term effects of policy- driven income shocks on human capital accumulation in low-income environments. Using administrative data on test scores of the universe of primary school students in Rwanda and the staggered rollout of coffee mills in the country, it shows a positive spillover effect of the coffee mills on students’ performance. Early life exposure to coffee mills is associated with a 0.09 standard deviation (4 percent) increase in student test scores. Improvements in household welfare, child health, and school attendance are likely operative channels of impact.