The Board for Decanomial Squares provides the flat working surface needed to lay out and organize the bead squares and cubes of the decanomial, supporting upper Primary and Lower Elementary children as they explore the squaring and cubing of numbers 1 through 10. Without a dedicated board, the layout becomes unwieldy and prone to disruption, breaking the child's concentration during a complex abstraction. This piece completes the decanomial material and makes extended work sessions genuinely feasible.