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Towers Group Sharing, Clip 6 of 6: Discussing their findings of how many towers can be built three cubes high
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Towers Group Sharing, Clip 6 of 6: Discussing their findings of how many towers can be built three cubes high [video]. Retrieved from https://doi.org/doi:10.7282/T3736P9W

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TitleTowers Group Sharing, Clip 6 of 6: Discussing their findings of how many towers can be built three cubes high
PublisherNew Brunswick, NJ: Robert B. Davis Institute for Learning, 1990-10-11, c1990-10-11
Persistent URLhttps://doi.org/doi:10.7282/T3736P9W
DescriptionHaving worked in the previous two clips of this series to create towers three cubes high selecting from two colors, researcher Alice Alston facilitates a group discussion about the students’ findings. She asks if anyone has changed their mind, referring to the estimates students had offered in clips two and three of this series as to how many towers they thought they could create three cubes high. All the students raise their hands. The researcher calls on Stephanie and Dana who say that there are fewer towers three high because “once you take them apart you start to see that they match. One [taken] off can mean a whole difference.” Stephanie holds up an example of two towers that match now that they are three cubes high. Several other groups of students concur with their findings. The researcher then asks why there are less towers considering that the students had previously thought that they could create more towers since they would have more blocks to work with. Brian answers that “if you take one off the bottom or one off the top you might have another one… that’s the same as that… and then you can’t use them…” Jeff says you can think about it like a math problem of “sixteen minus eight is eight”. The researcher asks another group what they think and they respond that they still think “it’s the same”. Researcher Amy Martino then asks the students to record in their math journals what they learned during the two sessions.
Math StrandCounting, Combinatorics
Math ProblemTowers
NCTM Grade Range3-5
NCTM Content StandardNumber and operations
NCTM Process StandardProblem solving, Reasoning and proof, Communication, Connections, Representation
Forms of Reasoning, Strategies and HeuristicsCounting, Direct reasoning, Guessing and checking
Grade Level3
Student ParticipantsDana (student), Stephanie (student), Milin (student), Brian (Kenilworth, student), Jeff (student), Jamie (student), Joey (student), Michelle R. (student), Michelle I. (student), Lauren (student)
MediatorsMartino, Amy Marie (Researcher), Alston, Alice S. (Researcher)
CorporateHarding Elementary School (Kenilworth, N.J.)
SettingClassroom
Student GenderMixed
Student EthnicityMixed
Camera ViewsPresentation view
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 Captured1990-10-11
Local IdentifierB51-CMB-T4T-CLIP006
Related Publication
   Type: Related publication
   Label: Ed.D. dissertation references the video footage that includes Towers Group Sharing, Clip 6 of 6: Discussing their findings of how many towers can be built three cubes high
   Date: 1992
   Author: Martino, Amy Marie (Rutgers, the State University of New Jersey)

   Name: Elementary students' construction of mathematical knowledge : analysis by profile
   Reference: QA.M386 1992
Source
   Title: B51, Towers Group Sharing (presentation view), Grade 3, October 11, 1990, raw footage.
   Identifier: B51-19901011-KNWH-PV-CLASS-GR3-CMB-T4T-RAW
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