Acutely Curious
Cutting through the obtuse.

Designing for
Mathematical Thinking

A three-lens design framework for evaluating and building learning experiences that produce real mathematical thinking — not just answer completion or digital compliance.

Designed for instructional coaches, curriculum specialists, and anyone doing systematic task design work — the people who build the conditions for mathematical thinking, not just deliver content.

Version 0.5 · Working Draft

The central question: What kind of mathematical thinking does this learning experience produce?

How this connects to the 3R Method: The Designing for Mathematical Thinking framework is the why — a shared language for what quality looks like. The 3R Method (Recognize, Reverse-Engineer, Reimagine) is the how — a repeatable process for applying these lenses when evaluating, deconstructing, and building learning experiences. These three lenses are also the foundation for using AI as a task design partner: when AI knows what you're looking for, it becomes a far more useful thought partner. Explore the 3R Method →
Further Reading
Building Thinking Classrooms
Peter Liljedahl
Classroom structures that foster student-owned thinking
Figuring Out Fluency
Bay-Williams & SanGiovanni (2021)
Seven significant strategies and productive fluency practice
NCTM Process Standards
National Council of Teachers of Mathematics
Problem solving, reasoning, communication, connections, representation
CCSS Mathematical Practice Standard 4
Common Core State Standards
Model with mathematics — the full mathematical modeling cycle
WA State Math Learning Standards
OSPI (2025)
Fluency as efficiency, flexibility, and accuracy; modeling embedded across all grades
Thinking Mathematically
Mason, Burton & Stacey
The investigative cycle: specializing, generalizing, conjecturing, convincing
Mathematical Task Framework
Smith & Stein
Cognitive demand levels in mathematical tasks

This framework stands on its own — rooted in practice, not derived from these sources. They are offered as adjacent thinking worth exploring.

This is a working draft shared for feedback. If you have reactions, questions, or suggestions, I'd love to hear from you: patty@acutelycurious.com

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Try the 3R Lesson Builder — AI coaching through all three stages of task design, built on this framework.
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