We're #1!

So naturally, we're also number one on the enemies list of NYC's Mayor;

The combination of weak charters closing and strong charters replicating is having powerful effects. The first major assessment of charter schools by Stanford's Center for Research on Educational Outcomes found their results to be extremely variable, and overall no better than conventional schools as of 2009. Its follow-up study several years later found that steady closures and their replacement by proven models had pushed charters ahead of conventional schools. In New York City, the average charter-school student now absorbs five months of extra learning a year in math, and one extra month in reading, compared with counterparts in conventional schools.

Other reviews show similar results, and performance advantages will accelerate in the near future. Charter schools tend to start small and then add one additional grade each year. Thus many charters in New York and elsewhere are just getting started with many children. As the schools mature, and weak performers continue to be replaced, charters will become even more effective.

Contrary to Mae West, too much of a good thing is not wonderful, for the competition;

At KIPP, the largest chain of charters, 86% of all students are low-income, and 95% are African-American or Latino, yet 83% go to college. In New York City, one of the academies Mr. de Blasio has denied additional space to is Harlem's highest-performing middle school, with its 97% minority fifth-graders ranking No. 1 in the state in math achievement. It and the 21 other schools in its charter network have passing rates on state math and reading tests more than twice the citywide average.

Judged by how far they move students from where they start, New York charter schools like Success Academies, Uncommon Schools, Democracy Prep and Achievement First—and others like them across the country—are now the highest-achieving schools in America. The oft-heard claim that charters perform no better than conventional schools on the whole is out of date and inaccurate.

Horse and buggy educational economics? Oh, we don't like that metaphor either.