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Creative thinking transforms existing information, either from long-term memory or external sources, into new representations and innovative ideas. Creative thinking is an activity that processes received information to produce new representations and innovative ideas. Developing this skill is essential for students; however, recent research has yet to classify their creative thinking in solving non-routine problems. This study created a new classification based on three aspects of creative thinking in solving mathematical problems. The research used a qualitative descriptive approach, employing 72 students from Indonesia as subjects in a test involving the use of the think-aloud approach in problem-solving. Data collection consisted of tests, observations, and interviews. There were three stages of data analysis: data reduction, presentation and conclusions, and verification. This study's results grouped students' creative thinking processes in solving non-routine problems into three classifications: direct, flexible, and elaborative. The three classifications differ in the strategies or steps used to solve problems. The similarities of the three classifications include using similar aspects of creative thinking, namely flexibility, fluency, and elaboration in solving non-routine problems, even though some of these aspects have yet to be realised optimally due to students' creative thinking in solving mathematical problems, especially non-routine problems, still needing improvement.
Kholid et al. (Mon,) studied this question.