This sourcebook serves as a comprehensive evaluation framework designed to measure student proficiency in early elementary mathematics. The author, Scott Foresman, provides a structured assessment system that aligns with the Investigations in Number, Data, and Space curriculum. By offering specific observational criteria and standardized tasks, the text enables educators to track individual progress and identify mathematical competency levels in first-grade students.

Educators frequently utilize this text as a foundational tool for implementing standardized assessment protocols within the Investigations curriculum. Experts note that the inclusion of bilingual materials makes this an accessible resource for diverse classroom environments.