Based on a major international teacher education research projectthe Mathematics Teaching in the 21st Century Study (MT21)this book investigates the pre-service preparation of middle school mathematics teachers in the United States, South Korea, Taiwan, Germany, Bulgaria, and Mexico. The study was funded by the National Science Foundation and the participating countries. William Schmidt (co-author of the influential TIMSS study on student test results in science and math) and Maria Teresa Tatto (director of the Teacher Education and Development study or TEDS-M) led a collaborative team of...