By conducting this lesson, we want the students to explore measurement by using a ruler as a traditional form of measurement.
Teachers measure from teacher's desk to chalkboard with their hands.
Discuss the problems they had with not having a standard way to measure a foot. A ruler is something that we all can use to measure so that our results will be the same. Let's take a closer look at the ruler. Pass out a ruler to each student. Draw a picture of a ruler on the chalkboard.