Teaching is a complex, ongoing endeavor that involves a myriad of decisions. NCTM's sixty-sixth yearbook is organised around three aspects of teaching: foundations for teaching, the enactment of teaching and the support of teaching nurtured in preservice education and strengthened throughout a teacher's career.

The accompanying professional development guidebook, edited by George W. Bright, contains activities that illustrate and extend some of the ideas in the yearbook in order to further teachers' growth and development in understanding and implementing effective mathematics instruction.

General editor: George Bright