Coloured Bead Stairs (AMI)

Description

The Coloured Bead Stairs are quite possibly the single most frequently used material in the entire Montessori mathematics curriculum, appearing in dozens of later exercises from the Addition Snake Game to the Seguin Boards. The set consists of bead bars from one to nine, each bar strung with beads of a single colour and length corresponding to its value, following the universal colour code in which one is red, two is green, three is pink, and so on through to nine.

Arranged in order, the bars form a visual “staircase” that lets a child see at a glance how each quantity relates to the next, while the consistent colour coding means that, once learned, a child can recognise a quantity by colour alone, without needing to count every bead. This instant recognition becomes an essential shortcut in nearly every arithmetic exercise that follows.

Because so much of the maths curriculum depends on this colour code being thoroughly internalised, time spent with the bead stairs early on pays dividends across years of later work, from simple addition right through to multiplication with the bead bars and beyond.