Golden bead bar of 10

The Golden bead bar of 10 is a sensory material of psycho-arithmetic that represents the number 10 in its physicality and geometric characteristics: a one-dimensional line. In its simplicity, it provides an immediate understanding of the concept of spatial dimension. The child starts from the unit (single pearl) representing the dimensionless point, then moves on to the golden stick of the ten, representing the one-dimensional line, then to the square of the 100 in two dimensions and finally to the cube, in three dimensions.