Cuisenaire® Rods help students transition from concrete to abstract representation of math concepts. They come in 10 different sizes and colors. Each color represents a different Rod length that can be assigned a different numeric value or unit of measure. Great for improving CCSS skills such as counting and cardinality, algebraic thinking, base ten and more. Rods measure 1cm–10cm in length. Contains 6 sets of 74 plastic rods, 6 trays with lid and Teacher's Guide. Use with 12–18 students.