1Blank Student Number Lines allow teachers to differentiate math instruction for students' individual needs. These open-ended number lines also provide teachers with a customizable, hands-on tool for every math lesson. Each set of student number lines includes 30 number lines that measure 22 x 1.5 each. They also feature a write-on/wipe-away surface to make it easy for students to use over and over again! Student number lines are the perfect hands-on tool for reinforcing mathematical concepts such as counting, identifying number patterns, partitioning numbers, comparing numbers, and building number sense.