Amazon.com description: Product Description: Troutman and Lichtenberg's best-selling text offers many features, chapters, and topics to reflect current research in mathematics education, the philosophy and recommendations of the NCTM, and the growing use of technology in the classroom. This highly respected text is known for its imaginative, class-tested activities, its practical teaching strategies, and its ability to explain and develop mathematical concepts clearly and succinctly. It has helped thousands of teachers and teachers-in-training gain the competence and confidence they need to develop a sound mathematics program in their K-8 classrooms that takes into account the learning needs of children.