In recent years, the advent of low-cost digital and mobile devices has led to a strong expansion of social interventions, including those that try to improve student learning and literacy outcomes. Many of these are focused on improving reading in low-income countries, and particularly among the most disadvantaged. Some of these early efforts have…

United Nations development goals have consistently placed a high priority on the quality of education--and of learning. This has led to substantive increases in international development assistance to education, and also to broader attention, worldwide, to the importance of children's learning. Yet, such goals are mainly normative: they tend…