Which mathematical product design innovation was specifically developed in the 1970s to improve spatial reasoning and is credited with enhancing geometric understanding in K-12 education?

The intersection of mathematics and product design has led to revolutionary educational tools that transform how students learn complex concepts. From ancient calculation devices to modern digital platforms, mathematics education products have evolved significantly over the centuries. This trivia question explores a pivotal innovation in mathematical product design that changed how an entire generation approached problem-solving.

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Cuisenaire Rods
Geometric Sketchpad Software
The Rubik's Cube
Tangram Puzzle Sets