Introducing the idea of finding the middle for data sets – video

This week while I have been at Concord Consortium in San Francisco I have spent much of my time making videos of recent activities that use CODAP.  All of these activities I have been exploring with teachers and students in the work that I do.

Some of the earlier posts were about how to use CODAP:

This video explores a teaching and learning idea for introducing early ideas of median.  For New Zealand teachers this would be an activity I would do with curriculum level 3/4 students as they start to explore quantitative data and are looking for a signal as to the middle of the data that they have.  CODAP allows us to put in a movable line and using counts it can be moved until about half the data is sitting on each side.  I expand this to looking at the middle 50% of the data values and give examples of how to describe this.  As this is aimed at curriculum level 3/4 the examples describe the whole group (Kowhai Whanau Group).

If you want to explore the data set used in the video you can get your own CODAP document to work on by clicking here.  The data set used is a made-up data set using a random sample of students from CensusAtSchool.