Developing Mathematical Ideas 

A curriculum designed to help teachers think through the major ideas of K-8 mathematics and examine how children develop those ideas.

Developing Mathematical Ideas (DMI) is a curriculum designed to help teachers think through the major ideas of K-8 mathematics and examine how children develop those ideas. At the heart of the materials are sets of classroom episodes (cases), illustrating student thinking as described by their teachers. The curriculum offers teachers opportunities to explore mathematics content, to analyze student thinking about that content in written and video cases, to share and discuss the work of their own students, and to read overviews of related research. Each unit provides 24 hours of instruction focused on specific mathematics content. Seven units are available:

  • Algebra: Patterns, Functions, and Change Casebook
  • Geometry: Examining Features of Shape Casebook
  • Geometry: Measuring Space in One, Two, and Three Dimensions Casebook
  • Number and Operations, Part 1: Building A System of Tens Casebook
  • Number and Operations, Part 2: Making Meaning for Operations Casebook
  • Number and Operations, Part 3: Reasoning Algebraically About Operations Casebook
  • Statistics: Modeling with Data Casebook

The materials were developed by Education Development Center (EDC), Summermath for Teachers at Mt. Holyoke College, and TERC, through a grant to EDC from the National Science Foundation.

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