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All Journal Jurnal Infinity Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Pendidikan Kimia (JPKim) Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI Jurnal Lentera Pendidikan Pusat Penelitian LPPM UM Metro Jurnal Pendidikan Edutama Jurnal Review Pendidikan dan Pengajaran (JRPP) IJOEP : International Journal of Ecophysiology SEPREN: Journal of Mathematics Education and Applied Jurnal Suluh Pendidikan Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Jurnal Pengabdian kepada Masyarakat Nusantara JURNAL PENDIDIKAN SAINS SOSIAL DAN AGAMA Dharmas Education Journal (DE_Journal) Jurnal Kajian Ilmu Pendidikan (JKIP) Jurnal Pengabdian Masyarakat Formosa (JPMF) Jurnal Pengabdian Masyarakat Bestari (JPMB) JURNAL CURERE PIJAR: Jurnal Pendidikan dan Pengajaran Innovative: Journal Of Social Science Research JNPM (Jurnal Nasional Pendidikan Matematika) Jurnal Pengabdian Multidisiplin Indonesia Jurnal Infinity
Christina Sitepu
Universitas HKBP Nommensen
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Public Health Social Sciences Other

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Analysis learning outcomes of mathematics education student in the online learning Sitepu, Christina; Gultom, Sanggam P.; Hutauruk, Agusmanto J. B.; Panjaitan, Simon M.
Jurnal Infinity Vol 13 No 2 (2024): VOLUME 13, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v13i2.p363-376

Abstract

This research aims to look at the impact and learning outcomes of using LMS and online learning platforms, so it is necessary to analyze learning outcomes and how they impact students, lecturers, and learning organizing institutions. This research shows that the LMS and online learning platforms used can improve student learning outcomes, which cannot be separated from the readiness of lecturers and students to implement it. This research used factor analysis (CFA), with a total of 150 respondents, students, and 15 lecturers. The impact provided by the use of LMS and online platforms in online learning is in the form of GPA and students' views on the learning process they have gone through. From the research results, several findings were obtained, including the ability to use LMS in online learning is not optimal, the GPA of learning outcomes is relatively high, and the readiness of lecturers and students to use LMS in online learning is still low.
IDENTIFIKASI KESULITAN DAN MISKONSEPSI KIMIA UMUM PADA MAHASISWA PENDIDIKAN MATEMATIKA UNIVERSITAS HKBP NOMMENSEN Sitepu, Christina
Jurnal Suluh Pendidikan Vol 9 No 2 (2021): September 2021
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/jsp.v9i2.581

Abstract

Characteristics of chemical materials are (1) Abstract, (2) Complex and multidisciplinary, (3). Involves analytical arithmetic operations. The transition from high school to university level is a learning process that is quite difficult if it is not accompanied by the right understanding. Understanding the concept of chemical materials obtained from high school, when studied at the university level, different meanings are obtained. This different understanding is what we often call misconceptions. Therefore, to find out the misconceptions that occur in students is a necessity and need for lecturers or teachers, so that they can be used as guidelines and guidance to deal with these misconceptions. This study was conducted to identify the percentage level of difficulty and general chemistry misconceptions for students of mathematics education at the University of HKBP Nommensen, using a random sampling technique. This research was carried out in 5 stages, namely (1). Creating a four-tier test diagnostic instrument; (2) Judgment of instruments by experts; (3) Data collection and interviews (4). Data processing and analysis, (5). Conclusion. Based on the results of data analysis and identification results in this study, the category of student conceptions in the Acid-Base solution material is the percentage of students who experience several categories of conception, namely understanding concepts, understanding partially, misconceptions, not understanding concepts and cannot be coded. The percentage of these categories is as follows; 24% of students fall into the category of understanding concepts, 32% of students fall into the category of partial understanding, 11% of students fall into the category of misconceptions, 30% of students fall into the category of not understanding concepts and 2% of students fall into the category of not being able to code, which means that not all students answered all the questions in the four-tier diagnostic test instrument. There are 2% who did not answer the four-tier diagnostic test.
PENGARUH KEMANDIRIAN BELAJAR DAN MINAT BELAJAR TERHADAP KEMAMPUAN NUMERASI PESERTA DIDIK PADA MATERI FUNGSI KUADRAT DI KELAS X Br. Sipayung, Yuli Pambreni; Situmorang, Adi Suarman; P. Sitepu, Christina
Dharmas Education Journal (DE_Journal) Vol 1 No 2 (2020): Desember
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Univesitas Dharmas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56667/dejournal.v1i2.1230

Abstract

Penelitian ini bertujuan untuk (1) Untuk mengetahui Pengaruh kemandirian belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat di kelas X SMA Swasta Katolik Mariana, (2) Untuk mengetahui Pengaruh minat belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat di kelas X SMA Swasta Katolik Mariana, (3) Untuk mengetahui Pengaruh kemandirian belajar dan minat belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat di kelas X SMA Swasta Katolik Mariana. Metode yang digunakan dalam penelitian ini adalah metode penelitian kuantitatif menggunakan pendekatan penelitian asosiatif (kausalitas atau pengaruh) dan menggunakan olah data SPSS versi 30.00 dengan menitikberatkan pada korelasi pengaruh dengan menggunakan analisis statistik regresi linier berganda. Dengan populasi penelitian yaitu seluruh peserta didik kelas X SMA Swasta Katolik Mariana T.A 2024/2025. Dengan teknik non probability sample yang menggunakan purposive sampling. Sampel yang diambil adalah kelas X.1 SMA Swasta Katolik Mariana T.A 2024/2025 berjumlah 30 orang. Instrumen yang digunakan adalah angket dan tes.Berdasarkan Hasil pada penelitian ini adalah (1) Terdapat pengaruh yang positif dan signifikan antara kemandirian belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat dengan hasil statistiknya yaitu koefisien regresinya 0,663 dengan hasil uji t sebesar 10,261 dan mempunyai tingkat signifikansi < 0,001 (α < 0,05). Dengan demikian hipotesis tersebut di terima. (2) Terdapat pengaruh yang positif dan signifikan antara minat belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat dengan hasil statistiknya yaitu koefisien regresinya adalah 0,270 dengan hasil uji t dengan nilai 7,705 dan mempunyai tingkat signifikansi < 0,001 (α < 0,05). Dengan demikian hipotesis tersebut di terima, (3) Terdapat pengaruh yang positif dan signifikan antara kemandirian belajar dan minat belajar terhadap kemampuan numerasi peserta didik pada materi fungsi kuadrat dengan hasil uji statistiknya yaitu koefisien regresinya adalah 36,853 dengan hasil uji t dengan nilai 9,067 dan mempunyai tingkat signifikansi < 0,001 (α < 0,05). Dengan demikian hipotesis tersebut dapat diterima
Berkolaborasi Dengan Edukasi, Relasi, dan Sosialisasi Untuk Menanggulangi Aksi Bullying di SMA Swasta GBKP Berastagi Sitepu, Christina Purnamasari K.; Silitonga, Romayana; Sianturi, Ria Irawaty; Purba, Imelda Natalia; Purba, Friska Patrecia
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 6 No. 2 (2025): Jurnal Pengabdian kepada Masyarakat Nusantara Edisi April - Juni
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v6i2.5889

Abstract

Bullying merupakan permasalahan serius di lingkungan sekolah yang dapat berdampak negatif terhadap perkembangan psikologis dan sosial peserta didik. Program pengabdian kepada masyarakat ini bertujuan untuk menanggulangi aksi bullying di SMA Swasta GBKP Berastagi melalui pendekatan edukasi, relasi, dan sosialisasi. Metode yang digunakan mencakup seminar interaktif, pelatihan empati, serta pendampingan bagi siswa, guru, dan orang tua. Kegiatan ini dirancang untuk meningkatkan pemahaman tentang dampak bullying serta membangun lingkungan sekolah yang lebih inklusif dan suportif. Hasil dari program ini menunjukkan adanya peningkatan kesadaran dan keterlibatan seluruh elemen sekolah dalam upaya pencegahan bullying. Dengan demikian, kolaborasi yang efektif melalui edukasi, relasi, dan sosialisasi terbukti menjadi langkah strategis dalam menciptakan lingkungan sekolah yang aman dan bebas dari bullying.
Kompetensi Dosen dan Mahasiswa dalam Metodologi Penelitian Pendidikan Matematika: Usaha Mempertajam Kualitas Penelitian Pendidikan Matematika Agusmanto J.B. Hutauruk; Christina Purnamasari K. Sitepu; Ruth Mayasari Simanjuntak
JNPM (Jurnal Nasional Pendidikan Matematika) Vol 9 No 1 (2025)
Publisher : Universitas Swadaya Gunung Djati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jnpm.v9i1.9984

Abstract

Student competence in conducting final research projects and supervisor competence in mentoring research are critical aspects that need enhancement. This study aimed to analyze the competence of supervisors and students in the methodology of mathematics education research. The research was part of a broader effort to enhance the quality of mathematics education research outcomes at the higher education level. The research methodology employs descriptive analysis, with respondents comprising supervisors and students engaged in thesis research within mathematics education programs. The findings revealed that supervisors' competence in research methodology remains suboptimal. The highest competence areas include understanding instrument validity and reliability, research hypothesis formulation, and collaborative research skills, with an average achievement rate of 66.7%. Similarly, students' understanding and application of research methodology are also insufficient, with the highest competence observed in differentiating between quantitative and qualitative research at 83.25%. Factors influencing research methodology competence for both supervisors and students were identified. These include a basic understanding of research (34.4%) and, notably, the lowest level of competence in sampling techniques (25.8%). The results highlight the need for further studies aimed at enhancing and refining research methodology competencies in mathematics education.
PENGARUH MODEL DISCOVERY LEARNING TERHADAP KEMAMPUAN REPRESENTASI MATEMATIS DAN SELF-EFFICACY PESERTA DIDIK KELAS X Manullang, Anna Kartika Br.; Simanjuntak, Ruth Mayasari; Sitepu, Christina P
Dharmas Education Journal (DE_Journal) Vol 4 No 3 (2024): DE_Journal
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Univesitas Dharmas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56667/dejournal.v4i3.1007

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model Discovery Learning terhadap kemampuan representasi matematis dan self-efficacy peserta didik kelas X SMK Negeri 6 Medan. Jenis penelitian yang digunakan dalam penelitian ini adalah quasi experiment dengan post-test only control group design dengan sampel penelitian dua kelas menjadi kelompok eksperimen dan kelompok kontrol berjumlah 64 siswa, dengan teknik random sampling. Kelas eksperimen diajarkan dengan model Discovery Learning dan kelas kontrol yang menggunakan pembelajaran konvensial. Instrumen yang digunakan tes kemampuan representasi matematis dan angket self-efficacy. Hasil analisis data menunjukkan bahwa nilai signifikansi (Sig.2-tailed) sebesar 0,003 < 0,05 dan nilai signifikansi (Sig.2-tailed) self-efficacy peserta didik sebesar 0,004 < 0,05 pada taraf signifikan 5 % yang menunjukkan bahwa ada pengaruh model Discovery Learning terhadap kemampuan representasi matematis pada materi sistem pertidaksamaan linear dua variabel di kelas X. Hasil analisis data menunjukkan bahwa pengaruh model Discovery Learning terhadap kemampuan representasi matematis sebesar 0,739 dan self-efficacy peserta didik sebesar 0,723.
Problem-Based Learning On The Ability Of Concept Understanding And Problem Solving Students' Mathematics On Function Material Squares In Grade X Pardosi, Monalisa; Tambunan, Hardi; Sitepu, Christina P
Jurnal Pendidikan, Sains Sosial, dan Agama Vol. 10 No. 1 (2024): Jurnal Pendidikan, Sains Sosial, dan Agama
Publisher : STABN RADEN WIJAYA WONOGIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53565/pssa.v10i1.2107

Abstract

This study aims to determine the effect of problem-based learning on students' conceptual understanding and mathematical problem solving abilities on quadratic function material at SMK Negeri 5 Medan 2024/2025. The type of research used is quantitative descriptive. The research population was all class X, and the research sample consisted of 65 class X students. The sampling technique was carried out using purposive sampling technique. The instruments used were tests, questionnaires and observation sheets. Hypothesis testing in this study used t-test and descriptive test. The results of the study showed that: (1) problem-based learning has an effect on conceptual understanding abilities, (2) the magnitude of the influence of problem-based learning on students' conceptual understanding abilities is 89.2%, (3) problem-based learning has an effect on mathematical problem solving abilities, (4) the magnitude of the influence of problem-based learning on problem solving abilities is 69.0%, (5) problem-based learning on students' conceptual understanding abilities is effective, (6) problem-based learning on problem solving abilities are effective.
Histological Analysis of Langerhans Islets and β-Cell Morphology in Diabetic Rats Treated with Bischofia javanica Nanoherbal Silaen, Srinatalia; Silaban, Irving; Sitepu, Christina Sitepu; Rumahorbo, Cheryl Grace Pratiwi
International Journal of Ecophysiology Vol. 7 No. 2 (2025): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijoep.v7i2.22691

Abstract

Diabetes mellitus (DM) is a chronic metabolic disorder marked by hyperglycemia and β-cell damage. Standard therapies like metformin reduce blood glucose but rarely restore pancreatic structure. Bischofia javanica leaves, rich in flavonoids and phenolics, have traditional antidiabetic use with antioxidant and anti-inflammatory potential. This study evaluated the effects of nanoherbal B. javanica on pancreatic histopathology in streptozotocin (STZ)-induced diabetic rats. Thirty male Wistar rats were divided into six groups: negative control (KN), positive control (KP), metformin 150 mg/kg BW (KS), and nanoherbal B. javanica at 50 mg/kg BW (P1), 100 mg/kg BW (P2), and 200 mg/kg BW (P3). Pancreatic tissues were examined using hematoxylin-eosin staining and analyzed with the Pancreatic Injury Severity Score (ISS). Results showed that KP developed severe damage with the highest ISS (2.86), characterized by islet shrinkage, β-cell degeneration, insulitis, fibrosis, and vascular abnormalities. KS showed moderate improvement (ISS 1.71), while nanoherbal treatment groups exhibited dose-dependent recovery. P3 (200 mg/kg BW) achieved near-normal morphology with the lowest ISS (0.71), demonstrating superior effects compared to KS. These findings suggest that nanoherbal B. javanica protects and regenerates pancreatic β-cells through antioxidant and anti-inflammatory mechanisms, while nanoformulation enhances bioavailability and therapeutic efficacy of its active compounds.
The Effectiveness of Deep Dialogue/Critical Thinking (DD/CT) Instruction on Scientific Reasoning Ability Tampubolon, Erna Helena M; Sitepu, Christina
Jurnal Inovasi Pembelajaran Kimia Vol. 7 No. 2 (2025): OCTOBER 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v7i2.69036

Abstract

Science inherently involves a process of reasoning, fostering honest, objective, critical, systematic, and creative attitudes, and shaping one's character and thought patterns to support informed conclusion-making. The Deep Dialogue/Critical Thinking (DD/CT) learning model is considered innovative as it encourages student activeness in the learning process by prompting them to seek knowledge and discover concepts, often leveraging technology to maximize interaction. This study investigated the impact of the DD/CT learning model on the mathematical reasoning ability of tenth-grade students at FKIP Universitas HKBP Nommensen. This research employed a quantitative approach, utilizing a quasi-experimental pretest-posttest control group design that involved both experimental and control classes. The research instruments underwent validity, reliability, discrimination, and difficulty testing, and the data met the prerequisites for normality and homogeneity. An independent t-test (α = 0.05) yielded a p-value of 0.004, indicating a statistically significant difference between the groups. Therefore, the DD/CT model has a positive effect on students’ mathematical reasoning skills.
Analisis Kemampuan Literasi Numerasi pada Materi SPLDV Menggunakan LKPD Berbasis Problem Based Learning pada Peserta Didik Kelas VIII SMP Adhyaksa Medan Br Silaban, Sari Raviala; Panjaitan, Simon M.; Sitepu, Christina
Innovative: Journal Of Social Science Research Vol. 3 No. 5 (2023): Innovative: Journal of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengetahui bagaimana kemampuan literasi numerasi peserta didik kelas VIII pada materi sistem persamaan linear dua variabel dengan menggunakan LKPD berbasis Problem Based Learning dan kemampuan literasi numerasi dengan menggunkaan pembelajaran konvensional, serta adakah perbedaan kemampuan literasi numerasi peserta didik pada materi sistem persamaan linear dua variabel dengan menggunaan LKPD berbasis Problem Based Learning dengan pembelajaran konvensional. Pendekatan yang digunakan dalam penelitian ini adalah pendekatan kuantitatif, sedangkan metode yang digunakan dalam penelitian ini adalah metode eksperimen. Desain dalam penelitian ini adalah Posttest-Only Control Design, pada desain subjek dipilih secara simple random sampling dan diperoleh sampel penelitian kelas eksperimen di kelas VIII C dan kelas kontrol di kelas VIII B. Pengumpulan data dalam peneltian ini dilakukan dengan tes. Setelah data terkumpul, selanjutnya di analisis secara kuantitatif. Hasil penelitian menunjukkan bahwa kemampuan literasi numerasi peserta didik pada materi sistem persamaan linear dua variabel dengan menggunakan LKPD berbasis Problem Based Learning termasuk dalam kategori sangat baik dengan rata-rata 84,33 dan kemampuan literasi numerasi peserta didik pada pembelajaran konvensional termasuk kategori baik dengan rata-rata 75. Terdapat perbedaan yang signifikan antara kemampuan literasi numerasi peserta didik pada pembelajaran menggunakan LKPD berbasis Problem Based Learning dengan pembelajaran konvensional.
Co-Authors Adi Suarman Situmorang, Adi Suarman Agusman Harefa Agusmanto Hutahuruk Agusmanto J.B. Hutauruk Agusmanto J.B. Hutauruk Alda Try Ananda Br Keliat BESLINA AFRIANI SIAGIAN Br Silaban, Sari Raviala Br. Sipayung, Yuli Pambreni Cahyana Hotmauli Sinaga Cahyana Hotmauli Sinaga Christina Nainggolan Christine M. D. Butar Butar Butar Butar Claresia C. Z. Harianja David Guth David Mrazek Delverida Simanullang Depari, Victory Dusan Jina Elda Naida Purba Elma Sari Sitompul EyxzaPrilia Pratiwi Simanjuntak Febiola Esrayanti Br Purba Feri Pangaribuan Fitri Andriyani Tarigan Franjimson Naiborhu Golda Novatrasio Sauduran Golda Novatrasio Sauduran Grace Florida Manurung Grace Florida Manurung Grace Manurung Grace Pebrini Siallagan Grace Pebrini Siallagan Gultom, Sanggam Gultom, Sanggam P. Guth, David Havrlik, Matous Hutahuruk, Agusmanto Hutauruk, Agusmanto Hutauruk, Agusmanto J. B. Jan Tomasov Jina, Dusan Jusmen Sihotang KÅ™ivánková, Lenka Kristiani Br Manik Kristiani Bulele Lastiarma Br Sibarani Lena Pangaribuan Lena Rosdiana Pangaribuan Lenka Křivánková MadÄ›ra, Martin Manalu, Andriono Manik, Efron Manullang, Anna Kartika Br. Manurung, Grace Marisa Yunita Br Depari Marito Silalahi, Titi Kamal Martin Maděra Matous Havrlik Mayasari Simanjuntak Melati Riani Marbun Melati Riani Marbun Melati Riani Marbun Milka Rotua Simanjuntak Mitha Lestari Sihombing Monalisa Martha Siahaan Mrazek, David Mutiara S. Tambunan Novri Yenti Panjaitan Nurhayati Sitorus Pangaribuan, Feri Pangaribuan, Lena Panjaitan, Simon Panjaitan, Simon M Panjaitan, Simon M. Panjaitan, Simon Maruli Pardosi, Monalisa Parlindungan Sitorus Pretty Viorella Br G inting Pretty Viorella Br Ginting Purba, Friska Patrecia Purba, Imelda Natalia Ratna Sari Hutauruk Rina Anindita Romesli Septima Br Sitanggang Rumahorbo, Cheryl Grace Pratiwi Ruth Mayasari Simanjuntak Ruth Mayasari Simanjuntak Salsalina Br Sembiring Samuel Juliardi Sinaga Sanggam Gultom Sanggam P. Gultom Sanita Angelina Saragih Sartika Elvrida Sinaga Sauduran, Golda Novatrasio Siagian, Besliana Afriani Siallagan, Grace Pebrini Sianturi, Ria Irawaty Silaban, Irving Silitonga, Romayana Simanjuntak, Silva Riska Natalia Simbolon, Lolyta Damora Simon M. Panjaitan Simon M. Panjaitan Simon Panjaitan Simon Panjaitan sinaga, samuel juliardi Sirait, Jelita Sirait Siregar, Hotlerisma Sitorus, Ruth Serenata Situmorang, Naldi Srinatalia Silaen Stepani Grace Zebua Stepani Grace Zebua Tambunan, Hardi Tampubolon, Helena Novitasari Titi Kamal Marito Silalahi Titi Kamal Marito Silalahi Tomasov, Jan Ulita, Rachel Zebua, Intan