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APA citation
Reviewing rod relationships and the candy bar problem, Clip 6 of 6: Comparing 1/2 and 1/3, David's balance beam [video]. Retrieved from
https://doi.org/doi:10.7282/T3R49NZ4
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Description
TitleReviewing rod relationships and the candy bar problem, Clip 6 of 6: Comparing 1/2 and 1/3, David's balance beam
PublisherNew Brunswick, NJ: Robert B. Davis Institute for Learning, 1993-09-24, c1993-09-24
DescriptionAs the students were dispersing after class, David called over researcher Carolyn Maher to share his model. He built a balance beam using one vertical and one horizontal rod, placed two light green rods on one end of the balance and three red rods on the other end of the balance. He told the researcher that he believed the balance would tip to the side of the light green rods when one light green rod and two red rods were removed. He also pointed out that the light green rod represented one half and the red rod represented one third. He then re-explained his model to a gathering group of students. Upon questioning, he showed that a white rod could be placed on the red rod so that the balance beam would remain stable. He then used a flat model to show why that worked.
RightsThe video is protected by copyright. It is available for reviewing and use within the Video Mosaic Collaborative (VMC) portal. Please contact the Robert B. Davis Institute for Learning (RBDIL) for further information about the use of this video.
Date Captured1993-09-24
Local IdentifierA77A78A79-FRC-CMPRF-CLIP006
Related Publication
Type: Related publication
Label: Ed.D. dissertation references the video footage that includes Reviewing rod relationships and the candy bar problem, Clip 6 of 6: Comparing 1/2 and 1/3, David's balance beam
Date: 2009
Author: Yankelewitz, Dina (Rutgers, the State University of New Jersey)
Name: The development of mathematical reasoning in elementary school students' exploration of fraction ideas
Reference: http://hdl.rutgers.edu/1782.1/rucore10001500001.ETD.000054787
Related Publication
Type: Related publication
Label: Ed.D. dissertation references the video footage that includes Reviewing rod relationships and the candy bar problem, Clip 6 of 6: Comparing 1/2 and 1/3, David's balance beam
Date: 2001
Author: Steencken, Elena Perrone (Rutgers, the State University of New Jersey)
Name: Tracing the growth in understanding of fraction ideas
Reference: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000055125
Source
Title: A77, Reassigning the number name one and introduction to fraction comparison (classroom view), Grade 4, September 24, 1993, raw footage.
Identifier: A77-19930924-CNCR-CV-CLASS-GR4-FRC-CMPRF-RAW
Source
Title: A78, Reassigning the number name one and introduction to fraction comparison (presentation view), Grade 4, September 24, 1993, raw footage.
Identifier: A78-19930924-CNCR-PV-CLASS-GR4-FRC-CMPRF-RAW
Source
Title: A79, Reassigning the number name one and introduction to fraction comparison (side view), Grade 4, September 24, 1993, raw footage.
Identifier: A79-19930924-CNCR-SIV-CLASS-GR4-FRC-CMPRF-RAW