This study aims to determine the effect of learning model Conceptual Understanding Procedures LKPD assisted on the ability of solving physics problems of high school students. This research is a quasi experimental research using untreated control group design with pretest and posttest. The population is all students of class XI IPA SMAN 4 Mataram. While the sampling using purposive sampling technique consisting of students class XI IPA 4 as experimental class and students of class XI IPA 1 as a control class. The problem solving capability data is obtained through a written test in the form of a description item. The result of hypothesis test analysis shows that there is influence of learning model of LKPD-assisted Conceptual Understanding Procedures toward the ability of problem solving physics.
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