GM5-1: Select and use appropriate metric units for length, area, volume and capacity, weight (mass), temperature, angle, and time, with awareness that measurements are approximate.
This means that when given a measuring task students will identify and use an appropriate metric unit. This involves the choice of an attribute (for example length, area, temperature) appropriate to the problem, the selection of an appropriate measurement tool, and the choice of unit adequate for the task, for example millimetres are needed to measure the length of solid material for construction.