This website for the Peabody College of Education: Department of Teaching and Learning at Vanderbilt University describes current projects in mathematics education research. Findings and innovations developed from several projects are available from this website. Current and completed projects include: Investigating Multimedia Case Studies as a Tool for Pre-service Teacher Development, Multiplicative Reasoning as a Foundation for Stochastic Reasoning, The National Research and Development Center for Improving Student Learning and Achievement in Mathematics and Science, Uses of Technology in Standards-based Teacher Education, Developing and Sustaining Technology-Intensive Classrooms Where Mathematics is Learned with Understanding, Computer Mini-Tools for Exploratory Data Analysis, Issues in Diversity and Equity: A Synthesis of Literature Relevant to Mathematics Classrooms which Emphasize Understanding, Mathematizing, Symbolizing, and Communicating, Hypermedia Materials for Elementary Mathematics Teacher Education, and Using Technology to Enhance Middle School Mathematics Teachers' Learning and Instruction.