This research aims to know the implementation of the Problem Based Learning model in critical thinking skill and student learning outcome to the Economy subject in the X IIS 3 class SMA Negeri 1 Garum. The research design used was classroom action research. This research was conducted in 2 cycles. Based on research results it was known that there was an improvement of student activity in the X IIS 3. It was showed the percentage of student critical thinking skills results in cycle I for 61,3% and in cycle II is improved for 77%. The improvement of student learning outcome could be seen from the completeness of student learning outcome in the cognitive domain with the post-test average score of students that improved from cycle I for 78,64% improved to be 91,61% in the cycle II. Therefore, it could be concluded that the implementation of Problem Based Learning could critical thinking skills and student learning outcomes in the X IIS 3 SMA Negeri 1 Garum. Suggestion for teacher of Economy The subject was this model could be made as an alternative to improve critical thinking skills and student learning outcomesKeywordscritical thinking, learning outcomes, problem-based learning
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