This is the latest volume in the CBMS (Conference Board of the Mathematical Sciences) Issues in Mathematics Education series, which seeks to stimulate the flow of information among mathematical scientists, mathematics educators, and mathematics teachers about innovative efforts to revitalize the teaching of the mathematical sciences at all levels. The first part of this volume is devoted to detailed descriptions of a wide variety of educational projects undertaken by mathematicians. These descriptions focus for the most part on substantial enterprises with an investment of several years and systematic review and evaluation. By contrast, the second part of the book centers on ideas that could be put into action at a modest level as a springboard for longer term projects. This book is intended to stimulate and inspire mathematical scientists to pursue educational work. In addition, those who have already ventured into educational activities and may be ready for deeper involvement will also benefit from this exploration of what can be done.