Students learn how to calculate the mean average from data in a list.

Later, as learning progresses students compare data sets using the mean.

**Differentiated Learning Objectives**

- All students should be able to calculate the mean average from a set of positive integers.
- Most students should be able to compare positive, integer data sets using the mean average.
- Some students should be able to collect a set of primary data and use the mean average to make comparisons