The Carson-Dellosa Boho Birds Number Line bulletin board set is an apt choice to encourage your students to excel in the class with its colorful features. It allows the instructors to development of mathematical skills with explanatory charts and images , so that the students can understand concepts thoroughly. This 8-piece board set contains 8 number line strips, 6″ x 21″ each, with alternating colors for odd and even numbers -20 through 120 and a resource guide to explain the subjects step by step. W ith its fun and engaging features, this board set is ideal for Kindergarten to Grade 5 learners.