The Math Mafia by Emily T. Hamilton is a historical account of mathematics education reform in twentieth-century America and how that movement played a role in shaping the broader contours of national education policy. Hamilton contends that a cohesive and well-organized community of advocates was instrumental in the rise of standardized testing and curriculum reforms, as well as federal involvement in classrooms, especially during the Cold War. By positioning mathematics as central to national strength and security, these reformers established math education as a key area of federal focus.

The "mafia" at the center of Hamilton's story includes mathematicians, educators, and researchers from universities, as well as members of government-funded organizations such as the National Science Foundation and various educational psychology circles. Prominent figures such as Edward Begle, who led the School Mathematics Study Group during the "new math" movement, played key roles. Other influential participants include federal education officials, advocates from professional organizations such as the National Council of Teachers of Mathematics, and cognitive scientists, who contributed both research and theoretical frameworks that informed curriculum design and assessment methods.

The Math Mafia offers historians, educators, policymakers, and other interested readers a compelling perspective on the legacy of the math education reforms on federal education policy in the United States and is a welcome contribution to ongoing discourse around "teaching toward the test," educational equity, school performance, and other hot-button issues in US education today.