Measurement helps describe our world using numbers.
We use numbers to describe simple things like length, weight, and temperature, but also complex things such as pressure, speed, and brightness. An understanding of how we attach numbers to those phenomena, familiarity with common measurement units like inches, liters, and miles per hour, and a practical knowledge of measurement tools and techniques are critical for students' understanding of the world around them. Compare and order objects according to some measurable attribute. Recognize the need for a uniform unit of measure. Understand and incorporate estimation and repeated measures in measurement activities.