Education Technology

Mathematics lessons for IB® Diploma Programme

Analysis and Approaches | Statistics and Probability

SD Measure of Spread

This lesson is intended as an introductory activity to the concept of standard deviation.

Planning and Resources


  • Students will identify the standard deviation as a measure of spread about the mean of a distribution.
  • Students will recognize that the size of the standard deviation depends on the spread of the distribution.


  • deviation
  • dot plot
  • mean
  • range
  • standard deviation