Problem solving Mathematics 21 Study and teaching (Secondary) 21 Dissertations 15 Dissertations, Academic 15 Study and teaching 14 Mathematical ability 9 Testing 9 Ability testing 5 Critical thinking 5 Decision making 5 Study and teaching (Primary) 5 Data processing 4 Arithmetic 3 College students 3 Design 3 Metacognition 3 Study and teaching (Higher) 3 Thought and thinking 3 Training of 3 Academic achievement 2 Case studies 2 Computer-assisted instruction 2 Educational psychology 2 Geometry 2 Human information processing 2 Instructional systems 2 Malay literature 2 Mathematical models 2 Mathematics teachers 2