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The Geometry of Sunlight: Continuous Multiplication with Naturally Occurring Parallel Lines

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Title: The Geometry of Sunlight: Continuous Multiplication with Naturally Occurring Parallel Lines
Language: English
Authors: Dimmel, Justin K., Pandiscio, Eric A., Bock, Camden, Reedman, Emma
Source: North American Chapter of the International Group for the Psychology of Mathematics Education. 2021 (pter).
Availability: North American Chapter of the International Group for the Psychology of Mathematics Education. e-mail: pmena.steeringcommittee@gmail.com; Web site: http://www.pmena.org/
Peer Reviewed: Y
Page Count: 10
Publication Date: 2021
Sponsoring Agency: National Science Foundation (NSF)
Contract Number: 1822800
Document Type: Speeches/Meeting Papers
Reports - Research
Education Level: Elementary Education
Higher Education
Postsecondary Education
Descriptors: Geometry, Mathematics Instruction, Multiplication, Light, Teaching Methods, Problem Solving, Preservice Teachers, Teacher Education Programs, Elementary School Teachers, Spatial Ability, Measurement, Instructional Materials, Methods Courses, Video Technology
Abstract: We report the design of an analog technology, what we refer to as a SunRule, that uses sunlight to model multiplication. Physical models that explore multiplication are fixtures in elementary mathematics classrooms. Our interest in physical models of multiplication was driven by an overarching design problem: How could a physical tool realize a continuous model of multiplication? That is, how could we represent continuous, variable quantities with physical things? We identify specific challenges the SunRule was designed to solve. We explain the mathematical underpinnings of the device and report a teaching experiment during which preservice teachers explored the device in small, socially-distanced groups. We consider how explorations with the SunRule create opportunities for mathematically rich instructional activities that are also essentially connected to being outside. [For the complete proceedings, see ED630060.]
Abstractor: As Provided
Entry Date: 2023
Accession Number: ED630172
Database: ERIC
FullText Text:
  Availability: 0
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  Data: North American Chapter of the International Group for the Psychology of Mathematics Education. e-mail: pmena.steeringcommittee@gmail.com; Web site: http://www.pmena.org/
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  Data: We report the design of an analog technology, what we refer to as a SunRule, that uses sunlight to model multiplication. Physical models that explore multiplication are fixtures in elementary mathematics classrooms. Our interest in physical models of multiplication was driven by an overarching design problem: How could a physical tool realize a continuous model of multiplication? That is, how could we represent continuous, variable quantities with physical things? We identify specific challenges the SunRule was designed to solve. We explain the mathematical underpinnings of the device and report a teaching experiment during which preservice teachers explored the device in small, socially-distanced groups. We consider how explorations with the SunRule create opportunities for mathematically rich instructional activities that are also essentially connected to being outside. [For the complete proceedings, see ED630060.]
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PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=eric&AN=ED630172
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    Languages:
      – Text: English
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      Pagination:
        PageCount: 10
    Subjects:
      – SubjectFull: Geometry
        Type: general
      – SubjectFull: Mathematics Instruction
        Type: general
      – SubjectFull: Multiplication
        Type: general
      – SubjectFull: Light
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      – SubjectFull: Methods Courses
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      – SubjectFull: Video Technology
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      – TitleFull: The Geometry of Sunlight: Continuous Multiplication with Naturally Occurring Parallel Lines
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