Education is not the only cause of inequality, but it's part of the problem:
Are American schools making inequality worse?, American Educational Research Association: The answer appears to be yes. Schooling plays a surprisingly large role in short-changing the nation's most economically disadvantaged students of critical math skills, according to a study published today in Educational Researcher, a peer-reviewed journal of the American Educational Research Association.
Findings from the study indicate that unequal access to rigorous mathematics content is widening the gap in performance on a prominent international math literacy test between low- and high-income students, not only in the United States but in countries worldwide.
Using data from the 2012..., researchers from Michigan State University and OECD confirmed not only that low-income students are more likely to be exposed to weaker math content in schools, but also that a substantial share of the gap in math performance between economically advantaged and disadvantaged students is related to those curricular inequalities. ...
"Our findings support previous research by showing that affluent students are consistently provided with greater opportunity to learn more rigorous content, and that students who are exposed to higher-level math have a better ability to apply it to addressing real-world situations of contemporary adult life, such as calculating interest, discounts, and estimating the required amount of carpeting for a room," said Schmidt, a University Distinguished Professor of Statistics and Education at Michigan State University. "But now we know just how important content inequality is in contributing to performance gaps between privileged and underprivileged students."
In the United States, over one-third of the social class-related gap in student performance on the math literacy test was associated with unequal access to rigorous content. The other two-thirds was associated directly with students' family and community background. ...
"Because of differences in content exposure for low- and high-income students in this country, the rich are getting richer and the poor are getting poorer," said Schmidt. "The belief that schools are the great equalizer, helping students overcome the inequalities of poverty, is a myth."
Burroughs, a senior research associate at Michigan State University, noted that the findings have major implications for school officials, given that content exposure is far more subject to school policies than are broader socioeconomic conditions.