ABSTRACT
My purpose in this chapter is to try to build some bridges among three groups:
Those who see the world from a perspective of human cognition (and particularly from the psychologists’ approach to cognition).
Those who view the world from the perspective of specialists in mathematics (and here I mean primarily “mathematics educators” rather than those who create and use mathematics in the fashion of mathematicians, physicists, and engineers).
Various interest groups, whose aims are sometimes in conflict, including parents, employers, educational administrators, and politicians.
