Preservice Teachers' Creation of Dynamic Geometry Sketches to Understand Trigonometric Relationships

Autor/inn/en	Brakoniecki, Aaron; Amador, Julie M.; Glassmeyer, David
Titel	Preservice Teachers' Creation of Dynamic Geometry Sketches to Understand Trigonometric Relationships
Quelle	In: Contemporary Issues in Technology and Teacher Education (CITE Journal), 18 (2018) 3 PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1528-5804
Schlagwörter	Computer Software; Geometry; Educational Technology; Technology Uses in Education; Visual Aids; Preservice Teachers; Mathematics Teachers; Secondary School Teachers; Trigonometry; Mathematical Concepts; Teacher Educators; Mathematics Instruction + Suchen Sie Ihr Suchwort? Geometrie; Unterrichtsmedien; Technology enhanced learning; Technology aided learning; Technologieunterstütztes Lernen; Anschauungsmaterial; Mathematics; Teacher; Teachers; Mathematik; Lehrer; Lehrerin; Lehrende; Trigonometrie; Teacher education; Education; Lehrerausbildung; Lehrerbildung; Mathematics lessons; Mathematikunterricht
Abstract	Dynamic geometry software can help teachers highlight mathematical relationships in ways not possible with static diagrams. However, these opportunities are mediated by teachers' abilities to construct sketches that focus users' attention on the desired variant or invariant relationships. The study described in this paper looked at two cohorts of preservice secondary mathematics teachers and their attempts to build dynamic geometry sketches that highlighted the trigonometric relationship between the angle and slope of a line on the coordinate plane. The authors identified common challenges in the construction of these sketches and present examples for readers to interact with that highlight these issues. They then discuss ways that mathematics teacher educators can help beginning teachers understand common pitfalls in the building of dynamic geometry sketches, which can cause sketches not to operate as intended. (As Provided).
Anmerkungen	Society for Information Technology and Teacher Education. P.O. Box 719, Waynesville, NC 28786. Fax: 828-246-9557; Web site: http://www.citejournal.org/
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01