Abstract
This chapter provides an overview of data analyzed by authors focusing on the constructs of argumentation, justification, and proof. Data comes from a US-based second-grade (ages 7–8) lesson focusing on the concept of equivalence. Evidence from whole class discussions, as well as written work and use of classroom tools incorporated are described in context.
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- 1.
The school district had adopted Investigations in Mathematics (2nd Edition) as their textbook, provided frequent professional development opportunities for elementary mathematics, and advocated reform-oriented pedagogy in each of their schools.
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Partners worked with individual Cuisenaire rod sets (72 rods), including only four each of orange rods (10 cm), blue rods (9 cm), and brown rods (8 cm). Smaller rod lengths were included at higher frequencies in each set.
References
Kosko, K. W., & Zimmerman, B. (2019). Emergence of argument in children’s mathematical writing. Journal of Early Childhood Literacy, 19(1), 82–106.
Krummheuer, G. (2007). Argumentation and participation in the primary mathematics classroom: Two episodes and related theoretical abductions. Journal of Mathematical Behavior, 26, 60–82.
Rogers, K. C., & Kosko, K. W. (2019). How elementary and collegiate instructors envision tasks as supportive of mathematical argumentation: A comparison of instructors’ task constructions. Journal of Mathematical Behavior, 53, 228–241.
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Kosko, K.W. (2022). Overview of the Elementary Level Data. In: Bieda, K.N., Conner, A., Kosko, K.W., Staples, M. (eds) Conceptions and Consequences of Mathematical Argumentation, Justification, and Proof . Research in Mathematics Education. Springer, Cham. https://doi.org/10.1007/978-3-030-80008-6_2
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