<![CDATA[Discipline is an important character trait that supports order and the effectiveness of the educational process; however, some students still demonstrate undisciplined behavior in the school environment. This study aimed to determine the effect of classical guidance and counseling services and the role playing technique on students' discipline at SMP Swasta Nupela, both simultaneously and partially. The study employed a quantitative approach with a one-group pretest-posttest design. The population consisted of 128 students, with a sample of 25 students from class VIII-A selected through purposive sampling. Data were collected using a Likert-scale questionnaire, structured observation, and documentation, and were analyzed using prerequisite tests, regression analysis, simultaneous and partial tests, and a paired sample t-test. The results showed that classical guidance and counseling services combined with the role playing technique had a significant simultaneous effect on students' discipline, with a contribution of 79.6%. Partially, both classical guidance and counseling services and the role playing technique also had significant effects on students' discipline. The mean discipline score increased from 51.68 in the pretest to 91.12 in the posttest. These findings indicate that integrating classical guidance and counseling services with the role playing technique can serve as an applicable intervention for developing students' disciplinary behavior. Future research is recommended to employ a control group and a longer observation period to obtain stronger evidence regarding the effectiveness of the intervention. ABSTRAK Disiplin merupakan salah satu karakter penting dalam mendukung keteraturan dan keberhasilan proses pendidikan, namun masih ditemukan siswa yang menunjukkan perilaku kurang disiplin dalam kehidupan sekolah. Penelitian ini bertujuan untuk mengetahui pengaruh layanan bimbingan dan konseling (BK) klasikal dan teknik role playing terhadap pembentukan disiplin siswa di SMP Swasta Nupela, baik secara simultan maupun parsial. Penelitian menggunakan pendekatan kuantitatif dengan desain one-group pretest-posttest. Populasi penelitian berjumlah 128 siswa dengan sampel 25 siswa kelas VIII-A yang dipilih melalui purposive sampling. Data dikumpulkan menggunakan angket skala Likert, observasi terstruktur, dan dokumentasi, kemudian dianalisis melalui uji prasyarat, regresi, uji simultan, uji parsial, dan paired sample t-test. Hasil penelitian menunjukkan bahwa layanan BK klasikal dan teknik role playing secara simultan berpengaruh signifikan terhadap pembentukan disiplin siswa dengan kontribusi sebesar 79,6%. Secara parsial, layanan BK klasikal dan teknik role playing juga menunjukkan pengaruh yang signifikan. Rata-rata skor disiplin meningkat dari 51,68 pada pretest menjadi 91,12 pada posttest. Temuan ini menunjukkan bahwa integrasi layanan BK klasikal dan teknik role playing dapat menjadi alternatif intervensi yang aplikatif dalam membantu membentuk perilaku disiplin siswa. Penelitian selanjutnya disarankan menggunakan kelompok kontrol dan periode pengamatan yang lebih panjang untuk memperoleh bukti pengaruh intervensi yang lebih kuat.]]>
