Young Mathematicians at Work: Constructing Number Sense, Addition, and Subtraction

**Editorial Review** "Young Mathematicians at Work: Constructing Number Sense, Addition, and Subtraction" has garnered a largely positive reception from educators seeking to enhance their understanding of mathematics instruction. Many teachers praise the book for its thoughtful exploration of how students develop mathematical concepts, enabling them to identify and assess the skills that their students are acquiring. The vignettes and theoretical analyses presented in the book provide concrete strategies to support elementary mathematics education, particularly in fostering a strong number sense and a deeper understanding of operations like addition and subtraction through concepts like place value. Educators from various backgrounds highlight the book's transformative impact on their teaching practices and student outcomes, noting improved math scores in underperforming districts. The supplemental materials associated with the series, including videos and lesson plans, have been particularly celebrated for their practical application in real classroom settings, helping to enrich both teaching and learning experiences. However, some feedback indicates that the book may not meet all educators' expectations, with a few finding it lacking in immediately applicable strategies for classroom use. Critics have suggested that it contains abstract concepts without the necessary concrete examples for quick implementation, emphasizing the need for resources that address the day-to-day challenges teachers face. Despite mixed reactions, the overall sentiment towards "Young Mathematicians at Work" is one of enthusiasm for its potential to deepen mathematical understanding among both teachers and students. The book is recommended as an essential resource for those looking to build foundational math skills in a developmental context. **