This Montessori Yellow Decimal Board and all of its accompanying aids to understanding are used during the children's work with the decimal system. This template should be printed on A3 card and laminated, ready for the children to work with.The yellow board can either be printed on white card in colour or on yellow card in colour, in the case of the clear document. And all the aids to understanding, the candelabra, the strips, and pinwheel, are printed on a3 in black and white.