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USA: Better teachers in upper-income schools ...

USA: „Better teachers, who can have a substantial effect on student success in later life, are disproportionately found in upper-income, high-performance schools, whereas more transient, less capable teachers are disproportionately found in lower-income, low-performance schools.“

Univ.-Prof. Dr. Robert Putnam, „Our Kids: The American Dream in Crisis“ (2015), S. 172