Make the concept of negative numbers more concrete with these engaging, hands on math tools. Slide and Learn number lines help students visualize what happens when they move past the zero, the origin, and into negative numbers. Hands On Resource For Beginners And Students Who Struggle With Negative Integers As students move the slider along the number line that ranges from 15 to 15, they can clearly see when they are in negative or positive integer territory. Outfit Your Math Center Keep these helpful tools in your math center. Or better yet, buy a few sets and give every student her or his own number line. Made of Sturdy Plastic These flexible plastic tools are designed for day in, day out classroom use. Affordable Sets Of 12 At less than 1. 50 each, this set of 12 Slide and Learns is a great investment. Looking for a way to help your students grasp the important concept of negative integers? Try these hands on math tools.