<![CDATA[This aim of this study to determine the effects of problem based learning to learning outcomes. This research sample was taken two classes with simple random sampling that are IX-3 and IX-2 to experiment groupand control group are 35 students respectively. The average scores result pretest both of treatment group and control group, was 35.29 and 34.86. The average scores result post-test both of the treatment group and control group, was 60.43 and 54.43. The scores pre and post-test mentioned T-test two parties, and the result of the detached score of pre-test obtained tcount< ttable, that the initial ability of students both of groups are same, while the T-test results for score post-test obtained tcount> ttable, that there is a difference in student learning outcomes with applying problem based learning with conventional learning models. Keywords: Problem Based Learning, Conventional, Simple Random Sampling.]]>
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