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).