In this essay, former secretary of education Rod Paige depicts the No Child Left Behind Act (NCLB) as the culmination of more than half a century of urgent but largely unheeded calls for reform of the nation's public education system. He explains the rationale for the design of NCLB and responds to several criticisms of the legislation, including the notion that it is a one-size-fits-all mandate and that its improvement targets are unrealistic. He further argues that the nation's public schools must become more responsive to the needs of students and their families in order to remain viable. Finally, he contends that subsequent reauthorizations should stay true to NCLB's original goal of holding school systems accountable for equipping all students with the academic skills on which America's future depends.