From talking with educators across the United States, the author has concluded that No Child Left Behind is having "an enormously positive impact." NCLB's most important benefit is a new focus on the academic performance of poor and minority students, English language learners, and students with disabilities. The law has also provided leverage for educators who are working to close achievement gaps, putting the power of the federal government behind them. Haycock describes school districts in which educators have used NCLB data to inform positive change. She cites results from state assessments and the National Assessment of Educational Progress indicating that the achievement of elementary students is rising and gaps are narrowing. She recommends changes in the law to increase its effectiveness, including getting serious about high schools, giving more support to low-performing schools, including growth data in accountability measures, raising curriculum standards, providing more guidance for teachers, and doing more to attract the best teachers to the most needy schools.