This success story highlights the experience of a early grade math teacher and textbook writer. She outlines the development of age-appropriate requirements and standards for students first and then, once those are set, write teacher guides and student textbooks. Before starting work on the teacher guide, the Program developed the topic scopes and sequences. The teacher guides were then designed to give teachers clear instructions on the lessons. With help of the teacher guides, the teachers will know how to begin the lesson, how to connect the topics, how to continue, what problems or unexpected questions may occur, and how to guide and assist students. Additionally, they incorporated more practical examples and problem-solving tools.