Pada penelitian ini terdapat permasalahan yaitu kurangnya kemampuan siswa dalam memanajemen waktu antara berorganisasi dan belajar. Penelitian ini bertujuan untuk mencari dan menganalisis data mengenai pengaruh keaktifan berorganisasi dan disiplin belajar terhadap prestasi belajar pengurus OSIS SMK Negeri 2 Buduran Sidoarjo dengan pendekatan kuantitatif. Populasi penelitian ini sebanyak 62 siswa. Dengan menggunakan sampel jenuh sebanyak 42 siswa. Instrumen yang digunakan adalah dengan melakukan observasi, wawancara, kuesioner dan dokumentasi. Menggunakan teknik analisis data uji normalitas, uji multikolinearitas, uji heteroskedastisitas, uji autokorelasi, uji liniearitas, regresi linear berganda, uji t, uji f, dan determinasi. Berdasarkan analisis data menggunakan program SPSS 16.0 diperoleh persamaan regresi linear berganda Y= 27,531 + 0,188 X1 + 0,218 X2. Keaktifan organisasi memiliki pengaruh positif secara parsial terhadap prestasi belajar pengurus OSIS dengan nilai sig < 0.05 atau 0.15 < 0.05 dengan T hitung 2,494, disiplin belajar memiliki pengaruh positif secara parsial terhadap prestasi belajar pengurus OSIS dengan nilai sig < 0.05 atau 0.39 < 0.05 dengan T hitung 2,101. Secara bersama-sama keaktifan belajar dan disiplin belajar memiliki pengaruh positif dan signifikan secara simultan terhadap prestasi belajar pengurus OSIS dengan nilai sig <0.05 atau 0.028<0.05. Persentase keaktifan berorganisasi dan disiplin belajar terhadap prestasi belajar pengurus OSIS sebesar 16,8%.
The problem in this research is the lack of students ability in managing their time between organizing and learning. The purpose of this research is to find and analyze the influence data of organizational activity and learning discipline on student achievement of OSIS SMK Negeri 2 Buduran Sidoarjo with quantitative approach. The population in this study was 62 students. The sample used a saturated sample of 42 students. The instruments used observation, interview, questionnaire and documentation. Data analysis techniques used normality, multicollinearity, heteroscedasticity , autocorrelation , linearity, multiple linear regression, t test, f test, and determination. Based on the data analysis using SPSS 16.0 program obtained by multiple linear regression equation Y = 27,531 + 0,188 X1 + 0,218 X2. Organizational Activity variable has positive and significant influence partially on student achievement of OSIS student with sig value <0.05 or 0.15
<0.05 with T arithmetic 2,494, the learning discipline variable has positive and partially significant influence on learning achievement of OSIS management with sig value <0.05 or 0.39 <0.05 with a count of 2.101. Both of learning activeness and learning discipline have a positive and significant influence simultaneously on learning achievement of OSIS management with sig value <0.05 or 0.028 <0.05. The percentage of donation of organizing activeness and learning discipline on learning achievement of OSIS management is 16,8%. The conclusion in this research is that organizing activeness has a positive and significant influence on learning achievement of OSIS board and the discipline of learning has a positive and significant influence on learning achievement of OSIS management. Simultaneous test of learning activity and learning discipline have a positive and significant influence on learning achievement of OSIS management.