Teach on a demo number line and have your students follow along with the student version. The number line is divided into 100 partitions with alternating red and white coloring every 10 spaces. The number lines are unlabeled therefore any value can be chosen such as 1, 20, 100 or even 1000. Both the demo and student versions have a dry-erase surface. Includes one demo open number line (13955) and 30 student multiples of ten open number lines (3 sets of 13948).