Which mathematical education company pioneered the color-coded manipulative system for teaching algebraic concepts, where different colored blocks represent different variables and operations?

Visual merchandising plays a crucial role even in mathematics education products. Companies strategically design and position their educational tools to maximize appeal and effectiveness. This poll tests your knowledge about a famous visual merchandising innovation that revolutionized how mathematical concepts are presented in educational settings.

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Cuisenaire Company (with their Cuisenaire Rods)
Algebra Tiles by ETA hand2mind
Base Ten Blocks by Didax
Numicon by Oxford University Press