Which mathematical product packaging innovation led to a 35% increase in classroom adoption rates by allowing teachers to visually track inventory without opening containers?

The packaging of mathematical learning tools and educational products involves careful consideration of both functionality and educational design principles. Leading companies in this industry often employ innovative approaches to make their products more appealing and effective for different learning styles. This poll tests your knowledge about a revolutionary packaging design that changed how mathematical manipulatives are marketed to educational institutions.

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The Fibonacci-sequenced nesting containers for geometric manipulatives introduced by Learning Resources in 2018
The transparent, gradient-colored fraction tower packaging with built-in assessment tracking system created by ETA hand2mind
The origami-inspired unfolding packaging for mathematical tools developed by Geometer's Sketchpad in 2019
The modular hexagonal packaging system for algebraic tiles pioneered by Texas Instruments' education division