Help your students understand common core skills such as fractions, order of operations and measurements with real-world representations, using these colorful plastic rods. There are ten different colors and each color represents a different length. Set colors include white, red, light green, purple, yellow, dark green, black, brown, blue and orange.Details:Multicolor0.4" to 4.0"6 sets (74 rods per set, 244 total rods)Includes 6 trays with lidsActivity guideFor use with 12 to 18 students at a timeFor ages 4 through 8