Giant Magnetic Cuisenaire® rods are ideal for front of class demonstrations. Magnetic backing allows rods to stick to whiteboards and other magnetic surfaces. Use large Cuisenaire Rods®to demonstrate and reinforce a variety of numeracy skills: addition & subtraction, multiplication & division, fractions & decimals, patterns, algebra, probability & statistics, geometry and measurement. Contains ten different lengths. Each length can be assigned a different numeric value or unit of measure. Largest piece measures 25cm L x 2.5cm W. Demonstration set includes: 64 Cuisenaire® Rods: 20 white (shortest) 12 red and four of each of light green, purple, yellow, dark green, black, brown, blue and orange (longest).