Though controversy rages about the overall contribution of charter schools to U.S. education reform, few doubt that a subset of charter schools has achieved extraordinary results with disadvantaged students. Relative to the enormous need for quality education, the number of children served by the best charter schools is far too low. Numerous…

Research increasingly demonstrates what common sense has long made apparent to educators and parents: Teacher quality matters--a lot. Teachers' knowledge and skills are the most vital in-school factors influencing children's learning. And, for children from disadvantaged backgrounds or troubled home environments, quality teaching is even more…