But rising income inequality explains, at best, half of the increase in the rich-poor academic achievement gap. It’s not just that the rich have more… - Sean Reardon

We need to start talking about this. Strangely, the rapid growth in the rich-poor educational gap provides a ray of hope: if the relationship between family income and educational success can change this rapidly, then it is not an immutable, inevitable pattern. What changed once can change again. Policy choices matter more than we have recently been taught to think. So how can we move toward a society in which educational success is not so strongly linked to family background? Maybe we should take a lesson from the rich and invest much more heavily as a society in our children’s educational opportunities from the day they are born. Investments in early-childhood education pay very high societal s. That means investing in developing high-quality child care and preschool that is available to poor and middle-class children. It also means recruiting and training a cadre of skilled preschool teachers and child care providers. These are not new ideas, but we have to stop talking about how expensive and difficult they are to implement and just get on with it.

What is news is that in the United States over the last few decades these differences in educational success between high- and lower-income students have grown substantially. We are still talking about this despite decades of clucking about the crisis in American education and wave after wave of school reform. Whatever we’ve been doing in our schools, it hasn’t reduced educational inequality between children from upper- and lower-income families. Part of knowing what we should do about this is understanding how and why these educational disparities are growing.

It might also mean greater business and government support for maternity and paternity leave and day care so that the middle class and the poor can get some of the educational benefits that the early academic intervention of the rich provides their children. Fundamentally, it means rethinking our still-persistent notion that educational problems should be solved by schools alone. The more we do to ensure that all children have similar cognitively stimulating early childhood experiences, the less we will have to worry about failing schools. This in turn will enable us to let our schools focus on teaching the skills — how to solve complex problems, how to think critically and how to collaborate — essential to a growing economy and a lively democracy.