This versatile tool is designed to be used with standard 1-centimeter base ten blocks (units and rods of 10) and helps students visualize and solve operations, ratio and percent problems. The durable 1-centimeter foam number line is 4" high x 21" long and has dual channels that can hold up to 50 base ten units and a dry-erase writing surface each. The dual channels provide students the ability to represent and model equations and problems in a structured, meaningful way. Includes teaching notes and sample activities for Common Core State Standards. Does not include base ten blocks or rods.