This book is the fruit of a symposium� in honor of Ted Eisenberg concerning the growing divide between the mathematics community and the mathematics education community, a divide that is clearly unhealthy for both.�The work confronts this disturbing gap by considering the nature of the relationship between mathematics education and mathematics, and by examining areas of commonality as well as disagreement.� It seeks to provide insight into the mutual benefit both stand to gain by building bridges based on the natural bonds between them.