Which mathematical product design innovation was specifically created to help visually represent abstract algebraic concepts and won the Educational Product Design Award in 2019?

In the world of mathematics education products, innovation is constantly reshaping how students learn complex concepts. Over the years, certain product designs have revolutionized mathematical learning through clever application of pedagogical principles and technology. This poll tests your knowledge of breakthrough product design in the mathematics education industry.

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AlgebraTiles™ - Color-coded manipulatives that physically represent variables, constants, and operations
NumberSphere - 3D holographic projection system for visualizing geometric transformations
EquationScape - Virtual reality environment where students navigate through mathematical problem spaces
FormulaBlocks - Magnetic building blocks that snap together to form equation structures