This volume focuses on challenges that need to be met and changes that need to be made. Repeatedly authors have stressed the importance of emphasizing conceptual understanding, instead of rote manipulations; the importance of focusing on situations where mathematics is used in the real world, instead of on rinky-dink word problems; the importance of utilizing the methods of data analysis, instead of relegating it to the last chapter (if it.s there at all); and the importance of fostering an active learning environment, where students ask what-if type questions, make connections, explore mathematical ideas, and work collaboratively instead of sitting passively copying notes off the board. The good news is that our colleagues are grappling with how to do this. Projects are being developed. New texts are being written. Alternative pedagogies are being implemented. The authors of the following papers are at the forefront of this movement. But, they are not alone. They are simply the ones who came to mind when we started this project over three years ago. We apologize to those of you who do not appear in this collection. You are here in spirit and are an important part of this movement of change.