Thousands of official documents and textbooks were analyzed. Thousands of teachers, principals and other experts responded to survey questionnaires. A sample of mathematics teachers in three countries had their lessons videotaped. Hundreds of thousands of children in almost 50 countries were tested in mathematics and science. This report presents a closer look at US mathematics and science education through careful examination of TIMSS data. The authors believe this investigation shows how deceptive many often unquestioned assumptions about American education can be. Drawing upon many new analyses not previously reported and integrating these with previous analyses of TIMSS data, the authors develop and illustrate the argument that what happens to American students is the consequence of American beliefs that shape educational practice and the accretion of a myriad educational choices made in mathematics and science education.