The document discusses several studies that show improvements in student achievement from refurbishing old school buildings in low-income areas. The studies found that modernized buildings with better lighting, air quality, and other facilities led to test score gains of 5-17 percentile points compared to older buildings. Specific programs that personalized learning through small schools, project-based learning, and adaptive learning technologies also showed promising results, such as doubling math pass rates in Boston and increasing graduation rates in New York.