Impact of the Curriculum

Research on the effects of Investigations in Number, Data, and Space is based on a variety of measures of student achievement and learning, including state-mandated standardized tests, research-based interview protocols, items from research studies published in peer-reviewed journals, and specially constructed paper-and-pencil tests.

This body of research includes classroom studies, large-scale comparisons across schools, and small-scale comparisons between classrooms. It also includes validation studies that examine impact in school systems that have undertaken a consistent, long-term implementation of Investigations as the core mathematics curriculum.