Young Children Reasoning about Symmetry in a Dynamic Geometry Environment

Autor/inn/en	Ng, Oi-Lam; Sinclair, Nathalie
Titel	Young Children Reasoning about Symmetry in a Dynamic Geometry Environment
Quelle	In: ZDM: The International Journal on Mathematics Education, 47 (2015) 3, S.421-434 (14 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1863-9690
DOI	10.1007/s11858-014-0660-5
Schlagwörter	Young Children; Abstract Reasoning; Thinking Skills; Attitude Change; Knowledge Level; Geometric Concepts; Concept Formation; Computer Assisted Instruction; Task Analysis; Teacher Role; Educational Technology; Semiotics; Learning Processes; Intervention + Suchen Sie Ihr Suchwort? Frühe Kindheit; Abstraktes Denken; Denken; Denkfähigkeit; Attitudinal change; Einstellungsänderung; Wissensbasis; Elementare Geometrie; Concept learning; Begriffsbildung; Computer based training; Computerunterstützter Unterricht; Aufgabenanalyse; Lehrerrolle; Unterrichtsmedien; Semiotik; Learning process; Lernprozess
Abstract	In this paper, we investigate children's learning of reflectional symmetry in a dynamic geometry environment. Through a classroom-based intervention involving two 1-h lessons, we analyse the changes in the children's thinking about reflectional symmetry: first, they developed dynamic and embodied ways of thinking about symmetry after working with a pre-constructed sketch called the "symmetry machine". Secondly, they moved from distinguishing symmetrical and asymmetrical figures statically to generalising about properties of symmetry. This was evident in the way children expressed symmetric movement through words, gestures and diagrams during the computer-based lessons as well as in the follow-up paper-and-pencil tasks. We highlight the specific roles of the teacher and of the digital technology in supporting the process of semiotic mediation through which the children learned symmetry. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01