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).