Perceptions of a Quadrilateral in a Dynamic Environment (a chapter from "Medium and Meaning: Video Papers in Mathematics Education Research, JRME Monograph #13")
By Paul Goldenberg and N. Shteingold
On paper, a quadrilateral appears however you draw it, and has whatever characteristics you ascribe to it. In a dynamic environment, points can be dragged so that the figure becomes a "triangle with an extra marked point on one side" or even self-intersecting, challenging students' ideas about what a quadrilateral is, and what properties are truly independent of the configuration of points. This video paper shows students' thinking as they investigate this situation.
Contact Info: E. Paul Goldenberg (1-800-225-4276 x2513)
Published by: National Council of Teachers of Mathematics Order Info
Learn more about this title on the publisher’s website: http://www.nctm.org/catalog/product.aspx?ID=12817
Price: $22.95
ISBN: 9780873535830
CD-ROM