Blank 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.