This new edition continues its activity-based approach to teaching with an emphasis on using manipulatives to build conceptual understanding.Combining practical teaching ideas, updated assessment techniques, and the NCTM standards, the book now offers a free CD-ROM packaged inside every book to enhance readers' learning. The CD-ROM is referred to throughout the book to incorporate actual classroom footage and a variety of activities. This book provides an activity based approach that offers many practical suggestions for incorporating manipulatives and group work in the classroom.