In this 3 minute video, Dedra Wright demonstrates how to teach students about the mean as a balance point. She models this concept using a number line and blocks which are manipulated throughout the activity. In the video, two data sets are shown as models and then connected to the written algorithm. A companion video, Introduction to the Concept of the Mean: Mean as Fair Share, is cataloged separately as a related resource.
(2 Comments)

Contributed by: Dedra L. Wright - Author, Virginia Department of Education - Publisher

Math TopicNumber Sense, Basic Operations, Number Concepts, Mathematical Practices, Mathematical Processes, Data and Statistics

Grade Level4, 5, 6+

Resource TypeActivity, Instructional Strategy, Video

**Additional Information**- AudienceEducator
- LanguageEnglish (USA)
- Education TopicTeaching strategies
- Interdisciplinary Connection
- Professional DevelopmentYes
- ContributorDedra L. Wright - Author, Virginia Department of Education - Publisher
- Publication Date2010
- RightsCopyright (c) 2010 Virginia Department of Education

http://www.doe.virginia.gov/home_files/web_policy.shtml - AccessFree access

**Standards**### Common Core State Standards for Mathematics

**Related Resources****User Comments****Great idea**

By bethb on 06/13/2012 - 14:09- I had always heard of mean as fair share, but I had not heard of it being used as the "balance point" before. I like that this activity gives students another opportunity to build the conceptual framework for Mean.
**Good technique but not connected**

By Uncle Bob on 11/13/2012 - 13:29- ... not connected to the formula for mean. By adjusting a pair of entries (blocks) down one and up one, the sum of the set is preserved. Students need to see the moves as math justified and not as a trick. Once that is established the blocks can be moved down and up 2 or 3.