<![CDATA[This study aims to improve students’ creative thinking skills through the implementation of the Jigsaw cooperative learning model combined with an open-ended approach using story-based problems. Creative thinking is an essential competency in mathematics learning, particularly in problem-solving situations that require divergent thinking. The research employed a Classroom Action Research (CAR) design conducted in two cycles, each consisting of planning, action, observation, and reflection stages. The subjects were 21 eleventh-grade students. The findings show that the application of the Jigsaw model with open-ended story-based problems significantly improved students’ creative thinking skills. The average score increased from 59.2 in the pre-action stage to 72.8 in Cycle I, and further improved to 84.5 in Cycle II. Improvements were evident across all indicators: fluency, flexibility, originality, and elaboration. Moreover, student learning activity increased from moderately active to highly active. Therefore, it can be concluded that the Jigsaw cooperative learning model combined with an open-ended approach using story-based problems is effective in enhancing students’ creative thinking skills and in fostering a more active and collaborative learning environment.]]>
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