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Improper Applications of Proportional Reasoning

Wim Van Dooren, Dirk De Bock, Lieven Verschaffel and Dirk Janssens 

December 2003, Volume 9, Issue 4, Page 204

Abstract:
A description of the improper proportional reasoning displayed by many students aged 12–16 when solving problems about the area of enlarged geometric figures and how persistent they are in this behavior.

Keywords:
Grade 9
Grade 10
Article
Teacher Education
Grades 6-8
Geometry & Measurement
Teacher
Professional Development / Teacher Education
Theory
Ratios / Proportions