After exploring with measuring with different units, the children realized that it is important to have standard units of measurements so that whenever anyone measures with a particular unit of measurement, anywhere in the world, they will get the same results.

The children tried this out with measuring the lengths of the different hallways around the school.  One observation that was made during the process was that it took a lot of meters to measure one of the hallways.

Think About It:  Why don’t we only have a couple units of measurements (inches and centimeters) to measure everything with?