Demonstration-Number-Line-RVFM-23200-0-This-popular-teaching-aid-is-over-9-metres-in-length-running-from-20-through-to-100-allowing-students-to-identify-positive-&-negative-numerals-&-determine-greater-than-or-less-than-by-numeral-position-on-the-number-line-Demonstration-Number-Line