The Center for Mathematics Education at the University of Maryland, along with "Math Is More" and a group of progressive curriculum development projects, hosted a conference of leaders in high school and collegiate mathematics education. This presentation, describing CME Project, was given as part of the Showcase of Promising Programs, which featured presentations and in-depth discussion of the ways that innovative curriculum, instruction, and assessment principles are embodied in materials produced by active curriculum development projects and the evidence about effects of those programs in school trials.