<![CDATA[This study aimed to determine the effect of attendance level, participation level, and students’ motivation on students’ achievement in the Mathematics for Senior High School course. The study employed a quantitative approach with an ex post facto research design. The population consisted of 22 students enrolled in the Mathematics for Senior High School course, and all population members were selected as the research sample using the total sampling technique. Data were collected through documentation, observation, and questionnaires. The data were analyzed using multiple linear regression analysis with the assistance of SPSS for Windows. The results showed that attendance level, participation level, and students’ motivation simultaneously had a significant effect on students’ achievement, with a significance value of 0.001 < 0.05. However, partially, attendance level, participation level, and students’ motivation did not have a significant effect on students’ achievement. The coefficient of determination (R²) was 0.579, indicating that 57.9% of the variation in students’ achievement could be explained by attendance level, participation level, and students’ motivation, while the remaining percentage was influenced by other factors outside the study. Based on the findings, it can be concluded that improving students’ achievement in the Mathematics for Senior High School course is not only influenced by attendance, participation, and motivation individually, but also by the integration of various academic and psychological factors in the learning process. ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh tingkat kehadiran, tingkat partisipasi, dan motivasi mahasiswa terhadap prestasi mahasiswa pada mata kuliah Matematika SMA. Penelitian menggunakan pendekatan kuantitatif dengan jenis penelitian ex post facto. Populasi penelitian terdiri atas 22 mahasiswa yang menempuh mata kuliah Matematika SMA dan seluruh populasi dijadikan sampel penelitian menggunakan teknik total sampling. Pengumpulan data dilakukan melalui dokumentasi, observasi, dan angket. Data dianalisis menggunakan analisis regresi linear berganda dengan bantuan SPSS for Windows. Hasil penelitian menunjukkan bahwa secara simultan tingkat kehadiran, tingkat partisipasi, dan motivasi mahasiswa berpengaruh signifikan terhadap prestasi mahasiswa dengan nilai signifikansi sebesar 0,001 < 0,05. Namun, secara parsial tingkat kehadiran, tingkat partisipasi, dan motivasi mahasiswa tidak berpengaruh signifikan terhadap prestasi mahasiswa. Hasil analisis juga menunjukkan nilai koefisien determinasi (R²) sebesar 0,579 yang berarti bahwa 57,9% variasi prestasi mahasiswa dapat dijelaskan oleh variabel tingkat kehadiran, tingkat partisipasi, dan motivasi mahasiswa, sedangkan sisanya dipengaruhi oleh faktor lain di luar penelitian. Berdasarkan hasil penelitian dapat disimpulkan bahwa peningkatan prestasi mahasiswa pada mata kuliah Matematika SMA tidak hanya dipengaruhi oleh kehadiran, partisipasi, dan motivasi secara individual, tetapi juga oleh keterpaduan berbagai faktor akademik dan psikologis dalam proses pembelajaran. ]]>
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