A relatively nascent but powerful body of research suggests that content-rich, standards-aligned, and high-quality curricula exert a powerful influence on student achievement. There is also early evidence that switching to a high-quality curriculum may be a more cost-effective way to raise student achievement than several other school-level interventions. Leading states and districts – from New York to Louisiana to Washington, D.C. – are showing how smart strategies can be used to ensure that high-quality standards are matched with high-quality instructional materials, leading to strong student outcomes – without trampling on local control of education.