[Economists Roland Fryer and Will Dobbie] found that the Harlem Children’s Zone schools produced “enormous” gains. The typical student entered the charter middle school, Promise Academy, in sixth grade and scored in the 39th percentile among New York City students in math. By the eighth grade, the typical student in the school was in the 74th percentile. The typical student entered the school scoring in the 39th percentile in English Language Arts (verbal ability). By eighth grade, the typical student was in the 53rd percentile.
Forgive some academic jargon, but the most common education reform ideas — reducing class size, raising teacher pay, enrolling kids in Head Start — produce gains of about 0.1 or 0.2 or 0.3 standard deviations. If you study policy, those are the sorts of improvements you live with every day. Promise Academy produced gains of 1.3 and 1.4 standard deviations. That’s off the charts. In math, Promise Academy eliminated the achievement gap between its black students and the city average for white students.
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To my mind, the results also vindicate an emerging model for low-income students. Over the past decade, dozens of charter and independent schools, like Promise Academy, have become no excuses schools. The basic theory is that middle-class kids enter adolescence with certain working models in their heads: what I can achieve; how to control impulses; how to work hard. Many kids from poorer, disorganized homes don’t have these internalized models. The schools create a disciplined, orderly and demanding counterculture to inculcate middle-class values.
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