AIMS Materials: Variability
Introduction to the Lessons
While students have been informally introduced to the idea of spread and range earlier, this set of lessons looks more closely at variability and the standard deviation. First students collect measurements to help them recognize two ways of looking at variability, as noise and as diversity. They informally think about a measure of spread from the center. The second lesson helps develop the idea of standard deviation and encourages students to reason about how this statistic is used to measure and represent variability and factors that affect the standard deviation, making it larger or smaller.
The AIMS materials for the topic of variability include several different zipped folders. Each folder contains the relevant materials for this topic. There is also a PDF file of the topic's sequence of ideas and associated activities. All materials can be accessed by selecting the icon to the right of the file description.