Interactive Geometry Software in the B.C. (Before Computers) Era
Heather Whittaker, Iris Johnson
October 2005, Volume 99, Issue 3, Page 170
The use of 3x5 cards to explore geometric relationships through the first three van Hiele levels of geometric reasoning. Students engage in reasoning and proof as they explore concepts related to parallel lines and quadrilaterals.
Teacher in Training / Preservice Teacher
Geometry & Measurement