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ERIC Number: EJ988762
Record Type: Journal
Publication Date: 2012-Sep
Pages: 6
Abstractor: ERIC
ISSN: ISSN-0025-5769
Core Conversations with Educative Dragging
Wanko, Jeffrey J.; Edwards, Michael Todd; Phelps, Steve
Mathematics Teacher, v106 n2 p108-113 Sep 2012
The Sliding along a Side task was presented at a National Council of Teachers of Mathematics (NCTM) conference session for high school teachers. According to the authors, while exploring this task with this group of experienced mathematics educators and classroom teachers, they shared a "gasp!" moment. With the aid of the dynamic mathematics software GeoGebra, participants investigated, in a whole-group setting, various conjectures associated with the task. Their group's collective conversation inspired them to explore new approaches and methods for analyzing the seemingly simple geometric figure. As "obvious" results were proved false, the task generated comments of surprise from audience members and presenters alike. They used the Measure-Trace-Algebratize (MTA) framework to create the Sliding along a Side task, a framework that other teachers can use to generate rich mathematical contexts for their students. Building on an understanding of the MTA approach, the authors discuss this task in detail, illustrating the usefulness of such tasks as vehicles for uncovering algebraic relationships within familiar geometric objects. (Contains 8 figures.)
National Council of Teachers of Mathematics. 1906 Association Drive, Reston, VA 20191-1502. Tel: 800-235-7566; Tel: 703-620-3702; Fax: 703-476-2970; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A