Geometry Study and teaching (Secondary) 15 Study and teaching 5 Dissertations 4 Dissertations, Academic 4 Testing 3 Computer-assisted instruction 2 Concept learning 2 Mathematical ability 2 Mathematics 2 Metacognition 2 Problem solving 2 Academic achievement 1 Cognition 1 Cognitive learning 1 Computer software 1 Geometry concept 1 Mechanical drawing 1 Plates (Engineering) 1 Polygons 1 Software 1 Study and teaching (Primary) 1 Transformations (Mathematics) 1 Van Hiele Model 1