Getting Beneath the Veil of Effective Schools: Evidence from New York CityCharter schools were developed, in part, to serve as an R&D engine for traditional public schools, resulting in a wide variety of school strategies and outcomes. In this paper, we collect unparalleled data on the inner-workings of 35 charter schools and correlate these data with credible estimates of each school's effectiveness. We find that traditionally collected input measures -- class size, per pupil expenditure, the fraction of teachers with no certification, and the fraction of teachers with an advanced degree -- are not correlated with school effectiveness. In stark contrast, we show that an index of five policies suggested by over forty years of qualitative research -- frequent teacher feedback, the use of data to guide instruction, high-dosage tutoring, increased instructional time, and high expectations -- explains approximately 50 percent of the variation in school effectiveness. Our results are robust to controls for three alternative theories of schooling: a model emphasizing the provision of wrap-around services, a model focused on teacher selection and retention, and the "No Excuses'' model of education. We conclude by showing that our index provides similar results in a separate sample of charter schools.
But the best charter schools are not random at all; they significantly and consistently outperform the averages, and they have a lot in common with each other in their ethos and operations. In particular these schools — which, in some states, have opened reverse achievement gaps with low-income minority students outpacing state averages — have tight controls over who teaches in them, a relentless focus on results, and an intense use of data to inform decisions. There is also solid evidence that their successes can be reproduced and scaled up in networks such as KIPP (99 schools in 20 states), Uncommon Schools (24 schools in three states), Achievement First (17 schools in Connecticut and New York) and Aspire Public Schools (30 schools in California). Overall, the consistency of performance among the top tier of charter networks as well as many individual schools, including the Preuss School at the University of California San Diego and the MATCH Charter Public School in Boston, helps explain why the Obama Administration awarded $50 million in replication funding for high-quality charters last month.
Charter Schools: The Good Ones Aren't Flukes (or Cherrypickers) - TIME
I've brought evidence that disputes, what you're saying.