Sarah Sword taught an Algebra 2 class in which a ninth grader said, "Sometimes I get the what and the how, but not the why. Sometimes I get the why but not the how. Sometimes I don't even get the what." She often thought of this student's statement while working as a graduate student and post-doctoral fellow on the revision of the middle school Connected Mathematics Project. She continued to think about this while she worked on the high school program, the CME Project. At EDC, Sarah directs the Mathematics Curriculum Program, a program for K-12 curriculum implementation, and the Center for the Scholarship of School Mathematics, which focuses on the mathematical preparation of mathematics educators.