The article explains why enhancing educational equity and minimising school failure are cost-effective, especially in light of the current economic crisis. Children are harmed by inequitable education policies and practices, which also impede economic and social progress. The importance of school in the lives of children is discussed. It is argued that school has the potential to be an ally for children, a provider of basic protection, a capacity builder, a safe base from which to explore oneself and the world, an integrator into community and culture, a gateway to opportunities, and a resource for parents and communities. It emphasises the importance of investing early in all children, particularly those from underprivileged backgrounds, and supporting them through upper secondary school, particularly in times of fiscal difficulties. Reduced school dropout benefits both society and individuals. It can also help with economic development and social development. Indeed, the most successful education systems in the world are those that combine quality with equity. In education, equity means that personal or societal conditions, such as gender, ethnic origin, or family background, are not impediments to realising educational potential, and that all students attain a basic minimum level of abilities.