摘要：The purpose of this study is to describe the effect of role playing on the students’ activity and the cognitive achievement in the material excretory system in SMPN 1 Batang.The population was half of second class VIII SMP N 1 Batang and the sample are used students of class VIII A and VIII E.The study Design was pre-experimental design from of pretest-posttest control group design.The results showed that the implementation of role playing in learning excretory system can increase the activity and cognitive learning outcomes.The result of the increase was gotten in using t-test.The result that value probability (sig.) <0.05 then Ho is rejected and Ha accepted.Means that there are differences in cognitive learning outcomes significantly between the control and the experimental class.Results obtained from the data that there is signifiant difference between the results before and after treatment (pretest-posttest).In addition,there is an n-gain test conducted to determine whether there is a difference in the results of pretest,posttest and N-gain between the experimental class and the control class.Based on the test results of N-gain,increased cognitive achievement experimental class (VIII A) amounted to 0.633 (moderate) and grade control (VIII E) 0.32 (moderate).The activity of students in class VIII A of 82.27% (very active) and VIII E amounted to 75.50% (Active).This indicates that the use of role playing method can increase the activity and cognitive learning outcomes of students.
关键词：role playing method;student activities;student results
