This study aims to examine students’ active participation in Indonesian language learning, the implementation of the discovery learning model, and its effectiveness in encouraging active participation among fifth-grade students at SD Negeri 5 Mattiropole, Lalabata Subdistrict, Soppeng Regency. This study employs a quantitative approach with a single-group pretest-posttest experimental design, utilizing data collection techniques such as observation and questionnaires. The study population consisted of 41 fourth- and fifth-grade students, with a sample of 15 fifth-grade students selected through random sampling. The results showed that the level of implementation of the model increased from 80% to 93.3%, and eventually reached 100% in the third session. Students’ active participation increased gradually from the “less active” category (40.8%) to “moderately active” (49.8%), and finally to “very active” (92.2%), accompanied by an improvement in learning outcomes from 26% to 53.3%, ultimately reaching 100% mastery. The t-test for samples showed a significant value of 0.000 (<0.05), proving a significant difference between the pretest and posttest. It was concluded that the implementation of the discovery learning model effectively increased students’ active participation in Indonesian language learning at SD Negeri 5 Mattiropole.
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