The Math 1 Teacher’s Edition, 4th ed., is designed to help teachers successfully implement the math materials by making the students active participants in math lessons. Each lesson contains background information, teaching strategies, and questions that guide teachers in teaching lessons that help students successfully understand the concepts of each lesson. Two new chapters have been added to the Math 1 educational materials—a chapter on plane figures and one on charts and graphs. The Teacher’s Edition also includes reduced-size student pages along with answer overprints for easy reference and grading. The Teacher’s Toolkit CD, located inside the back cover of the Teacher’s Edition, contains additional teacher helps.