Students learn about comparing stem and leaf diagrams using the median average and range. As students progress they are challenge to compare two data sets using back to back stem and leaf diagrams.

At the start of the lesson students recap drawing stem and leaf diagrams. In the main part of the lesson they learn how to find the median and range from an ordered diagram. At the end they are challenged to compare the speed of two runners using a back to back stem and leaf diagram.

**Differentiated Learning Objectives**

- All students should be able to calculate the median and range from an ordered stem and leaf diagram.
- Most students should be able to compare a back to back stem and leaf diagram using the median and range.
- Some students should be able to plot and compare a back to back stem and leaf diagram using the median and range.