Citation & Export
APA citation
Continuing to explore fraction comparisons, Clip 6 of 7: Erik and Alan compare one half and three fourths [video]. Retrieved from
https://doi.org/doi:10.7282/T35Q4TP9
Export
Description
TitleContinuing to explore fraction comparisons, Clip 6 of 7: Erik and Alan compare one half and three fourths
PublisherNew Brunswick, NJ: Robert B. Davis Institute for Learning, , c1993-10-06
DescriptionIn the sixth clip Erik and Alan worked on the task: Which is larger, one half or three fourths. Erik showed, using the orange and red train as one, that the difference between the two fractions was one fourth. Alan used the purple rods (which were equivalent to thirds in that model) to show that three purple rods were larger than one dark green rod (one half) by “two fourths, one half, or six sixths.” Erik asked Alan why he was using thirds instead of fourths. Erik then explained his solution to the visitor. He labeled his rods and explained that three fourths was larger than one half by one fourth. The visitor asked Alan if he agreed, and he said that he did. After this discussion, Alan built a second model to show the difference between three fourths and one half, this time using the brown rod as one. Researcher Amy Martino then questioned Erik and Alan about their models, and Erik repeated his explanation. Alan then used his new model to directly justify his solution of one fourth. The researcher then noted that, although they had built different models, they had each arrived at the same solution. Alan stated that no matter what model you make it will always remain one fourth. He then used a model twice the length of his second model to show that the relationship held, and concluded that the difference between the two fractions would always be one fourth.
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 Captured1993-10-06
Local IdentifierA89A90A91-FRC-CMPRF-CLIP006
Related Publication
Type: Related publication
Label: Ed.D. dissertation references the video footage that includes Continuing to explore fraction comparisons, Clip 6 of 7: Erik and Alan compare one half and three fourths
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 Continuing to explore fraction comparisons, Clip 6 of 7: Erik and Alan compare one half and three fourths
Date: 2008
Author: Reynolds, Suzanne Loveridge (Rutgers, the State University of New Jersey)
Name: A study of fourth-grade students' explorations into comparing fractions
Reference: QA.R465 2005
Source
Title: A89, Continuing to explore fraction comparisons (classroom view), Grade 4, October 6, 1993, raw footage.
Identifier: A89-19931006-CNCR-CV-CLASS-GR4-FRC-CMPRF-RAW
Source
Title: A90, Continuing to explore fraction comparisons (presentation view), Grade 4, October 6, 1993, raw footage.
Identifier: A90-19931006-CNCR-PV-CLASS-GR4-FRC-CMPRF-RAW
Source
Title: A91, Continuing to explore fraction comparisons (side view), Grade 4, October 6, 1993, raw footage.
Identifier: A91-19931006-CNCR-SIV-CLASS-GR4-FRC-CMPRF-RAW