<![CDATA[This study aims to analyze the improvement of students' understanding of physics concepts in straight motion materials after the application of the discovery learning model. The research uses a pre-experimental method with a one-group pretest-posttest design. The sample consisted of 34 students of class X at one of the public high schools in Makassar City who were selected through purposive sampling. Data was collected using a two-tier concept understanding test of 20 items that had been validated and had a KR-20 reliability of 0,82. Learning is carried out through the stages of stimulation, problem statement, data collection, data processing, verification, and generalization. Data were analyzed using descriptive statistics, Shapiro-Wilk normality test, paired sample t-test, Cohen's dz, and normalized gain (N-gain). The results showed that the average score increased from 52,35 in the pretest to 78,65 in the posttest. The paired sample t-test showed a significant difference between the pretest and posttest scores, t (33) = 12,94, p < 0,001, with an average N-gain of 0,55 (medium category). These findings show that the application of the discovery learning model is able to improve students' understanding of physics concepts in straight motion materials.]]>
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