This is a series of five outstanding modules designed to capture the spirit and intent of the NCTM’s Principles and Standards for School Mathematics 2000. The five modules correspond to the five strands of this Standards document and each module contains the following elements: • Ten rich, reproducible learning activities • teacher notes containing answers to all the exercises, reduced student pages, complete lesson plans and teaching tips • rubrics for assessing student work • samples of student work • Internet-based extensions • graphing calculator explorations to reinforce and expand concepts • correlations to the expectations in the NCTM’s Principles and Standards 2000 • discussion of the new trends in mathematics education including NCTM policy statements pertaining to constructivism, assessment, and the use of technology