Introduction
Chapter 1 Mathematical Argument in the Elementary Grades: What and Why?
Chapter 2 Elementary Students as Mathematicians
Chapter 3 The Teaching Model
Chapter 4 Using the Lesson Sequences: What the Teacher Does
Chapter 5 Mathematical Argument in the Elementary Classroom: Impact on Students and Teachers
Appendix A Same Sum, Same Difference (Whole Numbers)
Appendix B Changing a Number in Addition of Multiplication (Whole Numbers)
Online Lesson Sequences