Here is a well-designed lesson plan on common standards of measurement for your young mathematicians. In it, learners calculate measurements in standard and non-standard units. They make predictions, record data, and construct and design...

Young scholars, using a list made up of things from around the room; estimate the distance of one of the items on the list with one unit, record their prediction, and then actually measure items with non-standard measuring devise.

Students measure their own silhouette using Unifix cubes. They measure a drawing using non-standard measurement. They swap drawings and compare their measurements.