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Abstract

Abstract: This study examined the effectiveness of Problem Solving Strategy (PSS) to improve problem-solving skills at the junior high school students. This is an experimentation research with equivalent time series design. In general, the results showed problem solving strategy (PSS) effected to enhancing problem solving skills at junior high school students, which is proved through hypothetical testing, at pretest and posttest using the scale-test, counted z score 2,201 at significance level (p) = 0.028 < 0.05. The results of hypothetical testing, using the rubric-test, 1st test to 2nd test counted z score 2,207 at significance level (p) = 0.027 < 0.05, which means that H0 is rejected, next on 2nd test to 3rd test counted z scores 2,220 at significance level (p) = 0.026 < 0.05, which means that H0 is rejected and hypothetical testing in 3rd test to 1st test counted z score 2,227 at significance level (p) = 0.027 < 0.05, which means that H0 rejected and H1 accepted. Based on the findings of this research, it is advisable for the teacher guidance and counseling in schools should be able to provide the students needs, train students to develop cognitive skills in problems solving, from an early age by using the technique of problem solving strategy (PSS) as were tested in this study. For further research should further explore the subject with a level and a higher age.

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