This work provides a chapter excerpt from a comprehensive resource designed to guide educators in developing effective mathematics teaching practices for elementary and middle school students. It focuses on a developmental approach, emphasizing understanding student thinking and adapting instruction accordingly. The material aims to equip teachers with strategies to foster deep mathematical comprehension and engagement across different grade levels.

This excerpt is presented as a sample from a larger pedagogical work. The authors, recognized in the field of mathematics education, are known for their research-based approaches to teaching. The material is likely to be valued by educators seeking to align their teaching with developmental learning principles and research-backed methodologies. The focus on 'teaching developmentally' suggests an emphasis on understanding student progression and adapting instruction to meet diverse learning needs.