“…Over the past few decades, researchers have documented that many students encounter difficulties and show poor performance in geometry classrooms in both middle and high schools (e.g., Burger & Shaughnessy, 1986;Crowley, 1987;Fuys, Geddes, & Tischler, 1988;Gutierrez, Jaime, & Fortuny, 1991;Mason, 1997;Halat, 2007). Moreover, research shows a decline in students' motivation toward mathematics courses (c.f., Gottfried, Fleming & Gottfried, 2001).…”