One school became 46. One hundred sixty-five students became 15,500. A tiny outpost in Harlem spawned brethren all across Manhattan, the Bronx, Brooklyn, and Queens; Harlem Success Academy is now part of the Success Academy Charter Schools network, of which Moskowitz—the author of a lively new memoirThe Education of Eva Moskowitz—is CEO. From that position, she has become one of the country’s most influential crusaders at a turning point for charter schooling.