【Package Includes】 You will receive 31 pieces of slate blue math themed decors, which comprise 28 number lines, 1 pieces number 0 card, 1 pieces hollow frame card and 1 pieces “Today’s Number is” card and 3 sheets glue points. The number -20 to 120 lines are cut in sections, and it’s convenient for you to apply the pieces in any places. 【Helpful Tool for Number Learning】 The classroom number line bulletin border for school students can greatly help you teach more math skills such as counting, addition, subtraction, and more. In addition, the slate blue number line on the classroom wall is also helpful for beginners to learn the positive and negative operations. 【-20 to 120 Number Line Bulletin Board】Each slate blue number line for classroom wall decor contains 5 numbers, which measures approx. 35 x 12cm/14 x 4.7inches. The slate blue numbers line starts from -20 and ends with 120（both even & odd）, so it’s not only suitable for the students in primary school, but also middle school or higher grades.