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Growing achievement gap in the U.S. ...

„Recent research documents a growing achievement gap in the U.S. between children in high-and low-income families, a trend that contrasts with the decline of racial achievement gaps over the past 50 years.“

Univ.-Prof. Dr. Ann Owens u. a., „Trends in School Economic Segregation, 1970 to 2010“ (2014), S. 3