Abstract: An aid for learning roots includes a flat surface with a number of unit squares inscribed inside a larger square surrounded by a border. The board surface contains loops for mating engagement with rectangular patches having hooks for being detachably secured to the loops. There are 25 square patches of a number of colors, each corresponding substantially to a unit square and 25 rectangular strips each of width 1/5 a square side dimension. A perfect cube with unit squares inscribed on its face nests inside three intersecting orthogonal planar surfaces each having unit squares inscribed in a square of the same size as a cube face and a rectangular edge strip.