« Previous | 2 of 97 | Next »
« Back to Results List | Edit My Search | New Search | Selected Items
Selected item
thumbnail image
VIDEO
PDF
Transcript(16.19 kb)
Citation & Export
Related Resources (1)
View Analytics (1)
Statistics
Staff View

Now Playing: MP4-1
Close

Open in new window/tab

Citation & Export
Hide

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

Export

Click here for information about Citation Management Tools at Rutgers.

Related Resources (1)
Hide

Analytics (1)
Hide

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
Persistent URLhttps://doi.org/doi:10.7282/T3R49NZ4
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.
Math ToolCuisenaire rods
Math StrandFractions
Math ProblemFraction as number, Comparing fractions
NCTM Grade Range3-5
NCTM Content StandardNumber and operations
NCTM Process StandardProblem solving, Reasoning and proof, Communication, Connections, Representation
Forms of Reasoning, Strategies and HeuristicsDirect reasoning
Grade Level4
Student ParticipantsDavid (student), Meredith (student)
MediatorsMaher, Carolyn Alexander (Researcher)
CorporateConover Road (Colts Neck, N.J.)
SettingClassroom
Student GenderMixed
Student EthnicityWhite
Camera ViewsClassroom view, Presentation view, Side view
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