In Year One children compare the length and height of objects using terms such as longer/ longest and shorter/ shortest. They use non standard units to measure them.
They compare the mass and weight of objects using resources such as a simple balance and measure capacity using containers such as jugs and beakers using the appropriate vocabulary such as full, half full, empty, more than and less than.
In Year Two children move on to using standard units to estimate and measure length/height in any direction (m/cm); mass (kg/g); temperature (°C); capacity (litres/ml) to the nearest appropriate unit, using rulers, scales, thermometers and measuring vessels. They also compare and order lengths, mass, volume/capacity and record the results using >, < and =.