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All Journal Journal of Multidisciplinary Science: MIKAILALSYS Kesejahteraan Bersama : Jurnal Pengabdian dan Keberlanjutan Masyarakat
Indah Simbolon
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Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Education Environmental Science Law, Crime, Criminology & Criminal Justice Physics Social Sciences Other

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Membangun Kepemimpinan melalui Pelatihan Dasar di Kalangan Remaja Gereja HKBP Ressort Laguboti, Kabupaten Toba Ginola Carloz Hutabarat; Amelia Nainggolan; Indah Simbolon; Agustinus Purba; Ruslan Juliana Pardosi
Kesejahteraan Bersama : Jurnal Pengabdian dan Keberlanjutan Masyarakat Vol. 2 No. 3 (2025): Juli : Kesejahteraan Bersama : Jurnal Pengabdian dan Keberlanjutan Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/bersama.v2i3.1731

Abstract

This community service activity aims to form church youth leadership through basic training carried out in a participatory and educational manner at the HKBP Church, Laguboti Resort, Toba Regency. The activity was carried out on May 2, 2025 at the Simanarium Sipaholon and was attended by 50 active church youth. The implementation methods used include lectures, interactive discussions, leadership simulations, group dynamics, and direct mentoring. This activity is designed in several stages, namely preparation, implementation, and evaluation. The results of the activity showed that the training had a positive impact on participants' understanding of leadership that is devoted and has a Christian character. Participants experienced changes in attitude, increased participation, and showed a new spirit in service. This training has proven to be able to form reflective and responsible leadership characters, as well as encourage active involvement of youth in church life.
Implementation of the Problem-Based Learning Model to Improve Students' Mathematics Learning Outcomes in Grade IV at SD Negeri 060916 Medan Sunggal Frida Marta Argareta Simorangkir; Indah Simbolon; Hesty Vania Sinaga; Liza Natalia Sitopu; Ade P. Lumban Gaol; Karolina Linvia Fau
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i3.11295

Abstract

Low mathematics achievement among fourth-grade students at SD Negeri 060916 Medan Sunggal was associated with teacher-centered instruction that restricted students’ active participation in conceptual understanding and mathematical problem-solving. This study aimed to improve students’ mathematics learning outcomes on plane geometry through the implementation of the Problem-Based Learning (PBL) model. Classroom action research based on the Kemmis and McTaggart model was conducted in two cycles, each comprising planning, action, observation, and reflection, with 24 fourth-grade students as participants. Data were collected through classroom observations, interviews, achievement tests, and documentation and analyzed using qualitative and quantitative descriptive techniques. The findings demonstrated a progressive improvement in students’ mathematics achievement, with the mean score increasing from 76.25 in the pre-cycle to 80.92 in Cycle I and 85.83 in Cycle II. Learning mastery also increased from 66.67% in the pre-cycle to 83.33% in Cycle I and 95.83% in Cycle II. In addition, the implementation of PBL enhanced students’ classroom participation, collaboration, critical thinking, and problem-solving skills. The study concludes that PBL is effective in improving mathematics learning outcomes and the quality of instruction on plane geometry. These findings provide practical evidence for elementary school teachers seeking to implement student-centered, problem-oriented learning that strengthens both academic achievement and higher-order thinking skills.
Co-Authors Ade P. Lumban Gaol Agustinus Purba Amelia Nainggolan Argaretha, Frida Marta Ginola Carloz Hutabarat Hesty Vania Sinaga Karolina Linvia Fau Liza Natalia Sitopu Ruslan Juliana Pardosi