Canavcı H, Duatepe Paksu A. The Effect of Geometry-Based Brain Teasers on the Geometric Thinking Levels and Spatial Visualization Skills of Middle School Students . JIBA [Internet]. 2026Apr.25 [cited 2026Apr.25];16(1):76-102. Available from: https://ated.info.tr/index.php/ated/article/view/268