Abstract
This study is the second in a series designed to explore how class inclusion concepts evolve. Class inclusion concepts in this context is the ability to have an overview of possible relationships that exist among figures, and is an important characteristic of Level 3 thinking in the van Hiele Theory. Indepth interactive interviews were undertaken with 24 capable secondary students concerning how they view linkages among six different quadrilaterals. A developmental pattern is identified.
Penelope Currie and John Pegg
Investigating Students’ Understanding Of The Relationships Among Quadrilaterals