The Broad Stair

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The brown stair helps to develop the child’s visual discrimination of differences in two dimensions. It indirectly prepares the child for later work in geometry and for the concept of numbers, in demonstrating the unit difference in height and width between the ten successively thicker prisms. The child will build the brown stair from the thickest to the thinnest.

(Reference: http://www.justmontessori.com/sensorial/)

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