"If you can turn a rectangle into a square, you can turn a square into a rectangle ..." Young students experience the dragging tool

被引：27

作者：

Erez M.M. ^{[1
]}

Yerushalmy M. ^{[1
]}

机构：

[1] Department of Education, University of Haifa, Mount Carmel, 31905, Haifa

来源：

Int J Compur Math Learn | 2006年 / 3卷 / 271-299期

关键词：

Critical attributes; Dragging; Dynamic geometry environment; Hierarchical relations; Mental models;

D O I：

10.1007/s10758-006-9106-7

中图分类号：

学科分类号：

摘要：

This paper describes a study of the cognitive complexity of young students, in the pre-formal stage, experiencing the dragging tool. Our goal was to study how various conditions of geometric knowledge and various mental models of dragging interact and influence the learning of central concepts of quadrilaterals. We present three situations that reflect this interaction. Each situation is characterized by a specific interaction between the students' knowledge of quadrilaterals and their understanding of the dragging tool. The analyses of these cases offer a prism for viewing the challenge involved in changing concept images of quadrilaterals while lacking understanding of the geometrical logic that underlies dragging. Understanding dragging as a manipulation that preserves the critical attributes of the shape is necessary for constructing the concept images of the shapes. © Springer Science+Business Media, Inc. 2007.

引用

页码：271 / 299

页数：28

共 28 条

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