New York City study shows better test scores for charter school students

From The New York Times: Students who entered lotteries and won spots in New York City charter schools performed better on state exams than students who entered the same lotteries but did not secure charter school seats, according to a study by a Stanford University economist. Skeptics have discounted charter school's success by accusing them of “creaming” the best students, saying that the most motivated students and engaged parents are the ones who apply for the spots. The study’s methodology addresses that issue by comparing charter school students with students of traditional schools who applied for charter spots but did not get them. Most of the city’s 99 charter schools admit students by lottery.
Read "The Effects of New York City's Charter Schools on Student Achievement"