Seamlessly switch between standard imperial and metric units for enhanced measuring accuracy, Dynamic number line to improve math fluency and aid visual learners with integer markings ranging from -15 to 15, Simplify fraction counting using 0/12 to 12/12 markings plus additional benchmark fractions (1/6, 1/4, 1/3, 1/2), With a standard length of 12" (imperial) and 30.5cm (metric) this educational tool offers the convenience of a typical ruler along with bonus math advantages!, Squared-off edges ensure effortless drawing of straight lines to create neat and precise diagrams graphs geometric shapes and more