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Auf die ersten drei Lebensjahre kommt es an ...

„Differences in academic attainment and social development related to background emerged early (at age 3) and have remained fairly stable through to the end of Key Stage 3 (Anm.: mit 14 Jahren).“

Department for Education (Hrsg.), „Effective Pre-school, Primary and Secondary Education 3-14 Project (EPPSE 3-14)“ (2010), Executive summary