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Sumardi, Hari

Pendidikan Matematika, Universitas Bengkulu

Author-ID : 3040300

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Health Professions Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Pengaruh Penerapan Model Project Based Learning Terhadap Kemampuan Pemecahan Masalah Matematika Siswa Febrila, Lilia Gina; Hanifah; Sumardi, Hari; Haji, Saleh
Jurnal Pendidikan Matematika Vol. 14 No. 2 (2023): July 2023
Publisher : Jurusan Pendidikan Matematika FKIP Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jpm.v14i2.82

Penelitian ini bertujuan untuk mengetahui pengaruh penerapan model Project Based Learning (PjBL) terhadap kemampuan pemecahan masalah matematika. Jenis penelitian ini adalah penelitian eksperimen semu. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII SMP Negeri 1 Bengkulu Utara tahun ajaran 2022/2023 yang berjumlah 288 siswa dan sampel penelitian yaitu kelas VIII E dan VIII H yang berjumlah 64 siswa. Instrumen penelitian ini adalah tes kemampuan pemecahan masalah matematika. Analisis data dilakukan dengan uji analysis of covariance (ANACOVA). Hasil penelitian menunjukkan bahwa: (1) terdapat pengaruh linear kovariat kemampuan awal terhadap kemampuan pemecahan masalah siswa sebesar 60,4%. (2) terdapat pengaruh penerapan model pembelajaran Project Based Learning terhadap kemampuan pemecahan masalah siswa dengan mengontrol kemampuan awal siswa sebesar 33,3%. (3) pencapaian kemampuan pemecahan masalah siswa di kelas yang diajar menggunakan model pembelajaran Project Based Learning lebih tinggi dibandingkan kelas yang diajarkan dengan model pembelajaran ekspositori.

Algoritma Keprimitifan Dari Suatu Digraph Fathoni, Muhammad; Sumardi, Hari
Jurnal Warta Dharmawangsa Vol 18, No 3 (2024)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/wdw.v18i3.4743

The CORE model: An innovative strategy to strengthen students’ mathematical connections and problem-solving skills in junior high school Apriyanti, Peni; Sumardi, Hari; Hanifah, Hanifah
Alifmatika (Jurnal pendidikan dan pembelajaran Matematika) Vol 7 No 2 (2025): Alifmatika - December
Publisher : Fakultas Tarbiyah Universitas Ibrahimy

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/alifmatika.2025.v7i2.332-344

Developing students’ mathematical connection and problem-solving skills remains a persistent challenge in Indonesian secondary mathematics education. This study examined the impact of the CORE (Connecting, Organizing, Reflecting, Extending) instructional model on students’ mathematical connections and problem-solving abilities at SMPN 02 Kota Bengkulu. A quantitative approach with a controlled-comparison design was employed, and data were analyzed using Analysis of Covariance (ANCOVA) to assess the model’s effects while controlling for prior ability. The findings revealed that prior mathematical ability significantly explained 25.3% of the variance in students’ mathematical connection skills and 55.3% of the variance in their problem-solving performance. After implementing the CORE model, students demonstrated substantial improvement in both areas. The model accounted for 57.0% of the variance in mathematical connection ability, particularly enhancing students’ capacity to relate mathematics to other disciplines and real-life contexts, and 19.9% of the variance in problem-solving skills, especially in understanding problems, planning, and reviewing solutions. These results suggest that the CORE model effectively promotes cross-disciplinary integration, contextual understanding, and reflective reasoning in mathematics learning. Theoretically, the findings reinforce the role of constructivist and reflective learning frameworks in strengthening students’ higher-order thinking and meaningful engagement with mathematical concepts.

PENGEMBANGAN LKPD BERBASIS PROBLEM BASED LEARNING (PBL) PADA MATERI STATISTIKA KELAS X SMA Tamsil, Jimmi; Muchlis, Effie Efrida; Hanifah, Hanifah; Sumardi, Hari
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 14, No 4 (2025)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v14i4.13580

Peserta didik selama ini menggunakan LKPD yang masih memiliki keterbatasan dalam aspek desain dan tampilan. LKPD tersebut hanya disajikan dalam format hitam putih sehingga kurang menarik secara visual. Selain itu, LKPD tersebut cenderung digunakan secara dominan sebagai satu-satunya bahan ajar, sehingga belum mampu mendukung variasi sumber belajar yang lebih kaya pada pelaksaan pembelajaran. Studi ini difokuskan mengembangkan LKPD berbasis Problem Based Learning pada materi Statistika yang layak digunakan, ditunjukkan melalui tingkat kevalidan dan kepraktisannya, serta memiliki tampilan yang menarik dan berwarna. Riset ini mengadopsi model 4D: mendefinisikan, merancang, mengembangkan, dan menyebarkan. Penelitian ini melibatkan ahli materi, ahli desain, ahli bahasa, serta guru mata pelajaran matematika, serta 9 peserta didik kelas X SMA Negeri 11 Rejang Lebong. Temuan riset mengindikasihkan capaian indeks validitas sebesar dapat dilihat dari aspek kevalidan bahasa (0,94), media (0,85) dan materi (0,92), Berdasarkan angka tersebut, kualitas media pembelajaran dinyatakan memenuhi kriteria Sangat Valid. Secara praktikalitas, produk ini mencatatkan skor 97,1% sehingga dinyatakan masuk dalam kategori Sangat Praktis. LKPD berbasis Problem Based Learning yang dikembangkan telah memenuhi kriteria kevalidan dan kepraktisan. Dengan demikian, disimpulkan bahwa LKPD berbasis Problem Based Learning pada materi Statistika yang dikembangkan dinyatakan valid dan praktis digunakan dalam pembelajaran.

Students' Mathematical Literacy Ability in Solving Problems on Pattern Material Using the Bengkulu Local Contexts Agus Susanta; Hari Sumardi; Edi Susanto
Didaktik Matematika Vol 9, No 2 (2022): OCTOBER 2022
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v9i2.26741

Mathematical literacy is an important ability for students in Indonesia to face the implementation of minimum competency assessment and learning in the 21st century.This study aims to describe students' mathematical literacy skills in solving problems on pattern material in the Bengkulu local context. This study used a descriptive qualitative design. The research subjects were 30 students grade VIII from five schools in Bengkulu City. Subject selection through purposive sampling technique based on the level of intelligence with the number of each school is six students. Data were collected through interviews and mathematical literacy test using description questions that have been validated and tested. The data analysis consists of data reduction, data presentation, and concluding. The findings of this study are that students with low to moderate knowledge tend to have literacy skills at level 2. In contrast, students in the high knowledge group have literacy skills at level 3. Many students have used mathematical arguments to solve literacy problems but did not use concepts correctly.Students have not used the model structurally at the modeling stage, which resulted in errors in problem-solving and representation. Based on this, teachers need to emphasize the concept of material and mathematical modeling in learning.

Pengaruh Model Pembelajaran Problem Based Learning terhadap Kemampuan Pemecahan Masalah Matematis Peserta Didik Santi Mulyana, Sri; Susanta, Agus; Sumardi, Hari
Jurnal Pendidikan Matematika : Judika Education Vol. 9 No. 1 (2026): Jurnal Pendidikan Matematika: Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/b5nnrs83

This study aims to determine the extent to which the Problem Based Learning (PBL) model influences problem-solving ability. The type of research used is experimental research with a Pretest-Posttest Control Group Design. The research subjects were tenth-grade high school students who were divided into two groups: the experimental class, which received learning using the PBL model, and the control class, which received conventional learning. Data were collected through a problem-solving ability test and analyzed using the t-test. The results showed that the problem-solving ability of students taught with the PBL model was better than that of students taught with conventional methods. In addition, PBL learning also enhanced students’ teamwork skills and fostered a sense of responsibility in solving the given problems. Therefore, the PBL model can be considered an alternative in mathematics learning to improve students’ problem - solving abilities. Keywords: PBL; Problem Solving Skills; Mathematics Learning

Enhancing Mathematics Learning through Problem-Based and Digital Integration: A Study on Wordwall-Based Teaching Modules Lisa Gustiana Bellatama; Hari Sumardi; Effie Muchlis; Hanifah Hanifah
Journal Evaluation in Education (JEE) Vol 6 No 4 (2025): October
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v6i4.2191

Purpose of the study: This study aims to determine the validity and practicality of a Problem-Based Learning (PBL) module integrated with the Wordwall application for teaching the topic of similarity in junior high school mathematics. Methodology: The research adopts the Plomp development model, which includes five systematic stages: preliminary investigation, design, realization/construction, test-evaluation-revision, and implementation. Data were collected using expert validation sheets and student practicality questionnaires to assess the quality and usability of the developed module. Main Findings: The results show that the PBL–Wordwall-integrated module achieved a validity score of 89.83% (Very Valid) and a practicality score of 88.5% (Very Practical). The high validity demonstrates that the module’s content, structure, and linguistic elements are consistent with curriculum standards and responsive to learners’ cognitive levels. Likewise, the high practicality indicates that teachers and students found the module engaging, interactive, and easy to apply in classroom settings. Novelty/Originality of this study: The novelty of this study lies in the integration of the PBL approach with digital gamification through Wordwall, creating an innovative learning environment that fosters problem-solving, critical thinking, and motivation simultaneously. Unlike traditional static modules, this design embeds real-world contextual problems within interactive digital activities, bridging pedagogical theory and technological application. This research contributes both theoretically and practically by offering a replicable model for blending inquiry-based learning with gamified platforms in mathematics education. Overall, the developed module is effective, feasible, and capable of enhancing students’ engagement, conceptual mastery, and collaborative learning in mathematics.

ANALISIS PERSEPSI GURU TERHADAP IMPLEMENTASI KURIKULUM MATEMATIKA BERBASIS PROYEK DI SMP 11 KOTA BENGKULU Yanti, Yuli; Sumardi, Hari; Muchlis, Effie Efrida; Susanta, Agus
JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Vol 12, No 1 (2026)
Publisher : Universitas Bhinneka PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jp2m.v12i1.9170

This study analyzes mathematics teachers' perceptions of the implementation of a Project-Based Learning curriculum at SMP Negeri 11 in Bengkulu City. The transformation of the learning paradigm from teacher-centered to student-centered through Project-Based Learning (PBL) requires significant adaptation from educators. The study used a descriptive qualitative approach with semi-structured interviews, classroom observations, and documentation analysis with one seventh-grade mathematics teacher. Findings indicate that the school has not provided formal training on Project-Based Learning (PBL), but teachers have participated in independent training through webinars and the MGMP forum. Teachers have positive perceptions of the project-based curriculum implementation because it increases students' learning interest, critical thinking skills, and collaboration skills. Implementation has not been comprehensive across all materials due to limited time, resources, and supporting facilities. The project-based curriculum has a positive impact on student motivation and engagement, although individual participation varies. The study recommends the need for systematic and ongoing training support to optimize the implementation of Project-Based Learning (PBL) in mathematics learning.

Optimizing Electric Vehicle Charging Station Placement in Banyumas Using Graph Domination Theory Yogo Dwi Prasetyo; Hari Sumardi
ZERO: Jurnal Sains, Matematika dan Terapan Vol 9, No 3 (2025): Zero: Jurnal Sains Matematika dan Terapan
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/zero.v9i3.25502

This study applies graph theory to optimize the placement of electric vehicle (EV) charging stations in Banyumas Regency, Indonesia, using real geospatial data from 27 sub-districts. Each sub-district is modeled as a vertex, with edges defined by a 10 km coverage radius. The domination number is employed to identify the minimum number of charging stations required to ensure full spatial coverage. Unlike prior EV infrastructure studies in Indonesia that primarily rely on demand-based heuristics or clustering methods, this research explicitly guarantees coverage through graph domination theory. To enhance robustness, the domination-based solution is compared with a Set Covering Problem solved using Ant Colony Optimization (ACO). Both approaches consistently identify six strategic locations, achieving 100% coverage while reducing infrastructure requirements by approximately 78% compared to a one-station-per-sub-district strategy. The results provide practical guidance for policymakers and urban planners by supporting cost-efficient, scalable, and equitable EV charging infrastructure deployment in regions with early-stage EV adoption.

Pelatihan Pengembangan Modul Ajar Matematika Model APOS Berbantuan Geogebra kepada Guru MGMP Matematika SLTA Kota Bengkulu Hanifah Hanifah; Agus Susanta; Hari Sumardi; Effie Efrida Muchlis; Alma Hera
INCOME: Indonesian Journal of Community Service and Engagement Vol 5 No 1 (2026)
Publisher : EDUPEDIA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56855/income.v5i1.1822

Model Pembelajaran Aksi Proses Objek Skema (Model APOS) dirancang untuk pembelajaran berpusat pada mahasiswa/siswa dan berbantuan komputer, yang dilengkapi dengan Modul Ajar Berdiferensiasi. Diterapkannya kurikulum merdeka yang menuntut agar pelaksanaan pembelajaran dilengkapi dengan peralatan teknologi informasi, menjadi terbuka kesempatan bagi guru untuk menggunakan Model APOS berbantuan Geogebra dalam pembelajaran matematika di sekolahnya. Kegiatan pengabdian ini bertujuan untuk memberikan pengetahuan kepada Musyawarah Guru Mata Pelajaran (MGMP) Kota Bengkulu tentang pengembangan modul ajar berdiferensiasi materi matematika. MGMP ini adalah wadah bagi guru-guru dengan mata pelajaran yang sama untuk berkumpul, berdiskusi, dan bertukar pengalaman demi meningkatkan profesional dan kualitas pembelajaran. Metode pelaksanaan berupa Metode Demontrasi dimana Modul Ajar fungsi kuadrat berbasis Model APOS berbantuan software Geogebra dibagikan kepada peserta, peserta mengikuti arahan fasilitator untuk menerapkannya. Fasilitator menyampaikan materi meliputi pengenalan tools geogebra, visualisasi garis, dan fungsi kuadrat. Peserta mengikuti arahan yang ada pada Modul Ajar yang diberikan. Fasilitator meminta peserta untuk bergantian mendemontrasikan hasil kerjanya menjawab Modul Ajar di depan kelas. Masing peserta juga diminta untuk membuat soal tentang fungsi kuadrat lainnya untuk semua kemungkinan posisi gambar yaitu terbuka ke atas atau ke bawah, memotong sumbu x atau menyinggung sumbu x dan lainnya. Selanjutnya fasilitator mengedarkan angket respon. Hasilnya para peserta memberikan respon sangat positif terhadap pelaksanaan Modul Ajar yang diberikan dengan nilai rata-rata 89,167.

Co-Authors Abdul Rahman Singkam Abdurrobbil Falaq Dwi Anggoro Afnaria, Afnaria Agung Setia Budi Agus Susanta Agus Susanta AGUSTIN, ELUL DIAN Aliya Monika Br Ginting Alma Hera Andriany Ussandi Anggraini, Dewita Annisa Al Karimah Apriyanti, Peni Astria, Ririn Athiyyah Nur Herlita Audaya, Robiatul Bellatama, Lisa Gustiana Br Ginting, Aliya Monika Desfa Lusiana Dodi Isran Dona Eka Safitriyanti Dwi Agusantia Dwi Putri, Geza Edi Susanto Effie Muchlis Fatrima Santri Syafri Fauzi, Fentiriani Febrila, Lilia Gina Fentiriani Fauzi Gyzka Veliesa Haji, H Saleh Hanifah Hanifah Hanifah Hanifah Hanifah hanifah hanifah Hanifah Hanifah Hanifah Hanifah Hanifah Hanifah Hanny Nurhikma Prapti Hardini Agustika Herawati, Anisa Heri Retnawati Irsal, Nur Aliyyah Istikomar Istikomar Jesica Angela Fitri Khairani, Melvi Khairul Saleh Khalifah, Shela Mardha Kintan Ayu Septiany Kusuma, Helti Puji Lilia Gina Febrila Lilia Gina Febrila Lisa Gustiana Bellatama Luluk Lutfiya M. Irfan Anshori Miftakhul Janah Khoiriyah Muchlis, Effie Muchlis, Effie Efrida Muchlis, Effie Efrida Muhammad Fathoni, Muhammad Muhammad Yogi Ramadhan Mulya Sarti Apriani Nida Azizah Nur Aliyyah Irsal Nurliyan Hidayati, Latifa Nurul Astuty Yensi B Rahadi Bimansah Rahadi Bimansyah Rahma Nia Juita Resitaningtyas, Icha Ridho Agio Nesta Ridwanul Fata Ridwanul Fata Ringki Agustinsa Ririn Astria Robiatul Audaya Rusdi Rusdi Sakti, Intan Tiara Santi Mulyana, Sri Siagian, Teddy Alfra Sri Rahmayanti Susanta, Agus Suvriadi Panggabean Tamsil, Jimmi Teddy A Siagian Teddy Alfra Siagian Teddy Alfra Siagian Tria Utari Triyanti, Yeni Utari, Tria Yogo Dwi Prasetyo Youla Siscasari R Yuli Yanti Yuni Pusvita Zainal Azis Zamzaili Zamzaili Zamzaili Zamzaili Zamzaili Zamzaili, Zamzaili Zulkardi Zulkardi Zulkardi

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