The problem addressed is the low academic achievement in the Pancasila Education subject among fifth-grade student at SD Negeri 2 Sumberejo. the purpose of the study is to determine the effect of study discipline on students’ academic achievement in the Pancasila Education subject. This research employed a quantitative approach using the Ex-Post Facto method. The population of this study consists of all fifth-grade students at SD Negeri 2 Sumberejo, selected using Probability Sampling, with a sample totaling 57 students. Data analysis techniques included a test comprising questions and non-test method such as a quetionnaire and observation. The data analysis method used in this study was simple linear regression. The results of the data analysis indicate that there is an affect of study discipline on student learning outcomes, with an Fcount = 5,346 and significance level of 0,025 < 0,05, leading to the rejection is an effect of study disciplie on the learning outcomes of fifth-grade students at SD Negeri 2 Sumberejo in the subject of Pancasila Education.
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