About this product Didax® Unifix 1-120 number line provides an excellent visual aid for counting and measurement addition. Didax® Unifix 1-120 number line consists of twelve interlocking sections that helps to increment each number to 10. Number line includes teaching notes, unifix cubes that helps to reinforce number sense, counting and simple place value concepts. Age and grade: Ages 5 years and older and grades kindergarten and up • Unifix 1-120 number line is an excellent visual aid for counting, measurement addition • Track consists of twelve interlocking sections Each numbered in increments of 10 • Includes teaching notes