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Mapping Geometric Minds: Exploring 3D Thinking Skills of Elementary School Students Using the Van Hiele Model Nahdi, Dede Salim; Jatisunda, Mohamad Gilar; Cahyaningsih, Ujiati; Rasyid, Abdur; Hidayah, Ratna
Journal of Education For Sustainable Innovation Vol. 2 No. 1 (2024)
Publisher : Papanda Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56916/jesi.v2i1.806

This study investigates elementary school students' 3D geometric thinking skills using the Van Hiele model. The research employed a grounded theory approach, utilizing tests, observations, and interviews to assess students' geometric thinking levels across two elementary schools in West Java and Central Java, Indonesia. A total of 6 test items were developed based on Van Hiele's theory, targeting the visualization, analysis, and informal deduction levels. Results showed varied performance between the two schools. Students from the Majalengka school demonstrated stronger visualization skills (77.14%), while those from the Surakarta school showed better performance in analysis (67.86%) and informal deduction (53.57%). Overall, students exhibited a good foundational understanding of 3D shapes, with most achieving the visualization and analysis levels. However, challenges emerged at the informal deduction level, where students often opted for simpler problem-solving methods over more systematic approaches. The study highlights the effectiveness of the Van Hiele model in assessing geometric thinking development and provides valuable insights for curriculum development and teaching strategies. It emphasizes the need to reinforce visualization and analysis skills while gradually introducing more abstract and systematic thinking in geometry education. The findings contribute to the understanding of elementary students' 3D geometric thinking skills and offer a basis for improving geometry instruction at the primary level.

Optimalisasi Google Forms Untuk Meningkatkan Kemampuan HOTS Siswa SMA Melalui Soal Pilihan Ganda Beralasan Suryaningsih, Yeni; Jatisunda, Mohamad Gilar; Rasyid, Abdur
SANISKALA : Jurnal Pengabdian Masyarakat Vol. 2 No. 1 (2024)
Publisher : FKIP Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jsk.v2i1.11165

Evaluasi pembelajaran yang efektif memainkan peran penting dalam pengembangan keterampilan berpikir kritis siswa. Penelitian ini bertujuan untuk meningkatkan kemampuan berpikir kritis siswa SMA melalui implementasi Google Forms sebagai alat evaluasi. Metode penelitian yang digunakan adalah metode pengabdian kepada masyarakat dengan melibatkan siswa SMA sebagai subjek. Kegiatan ini meliputi perencanaan, studi literatur, desain modul Google Forms, pelatihan guru, implementasi di kelas, monitoring, dan evaluasi. Hasil penelitian menunjukkan bahwa terdapat peningkatan signifikan dalam skor rata-rata siswa dari 55 pada pretest menjadi 75 pada posttest. Analisis data menunjukkan bahwa penggunaan Google Forms efektif dalam meningkatkan keterampilan berpikir kritis siswa secara merata. Kesimpulan dari penelitian ini adalah bahwa teknologi evaluasi berbasis Google Forms dapat digunakan sebagai alat yang efektif untuk meningkatkan kualitas pembelajaran dan keterampilan berpikir kritis siswa SMA.

Enhancing mathematical problem-solving ability through project-based learning: A study of vocational high school student Jatisunda, Mohamad Gilar; Suryadi, Didi; Prabawanto, Sufyani
Jurnal Elemen Vol 10 No 3 (2024): September
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jel.v10i3.26244

This study aims to improve the mathematical problem-solving ability of students at Vocational High School (VHS) through implementing Project Based Learning (PjBL). The research method used was a quasi-experiment with a matching-only pretest-posttest control group design, with a sample of 64 students divided into two classes, namely experimental and control classes, each consisting of 32 students. The sampling technique used was purposive sampling, where the sample was selected based on specific criteria relevant to the research objectives. Data were collected using tests of mathematical problem-solving ability administered before (pre-test) and after (post-test) the treatment. Data were analyzed using an independent sample t-test and a two-way ANOVA test with univariate general linear model (GLM) analysis. The results showed a difference between the experimental and control groups before the treatment. However, after the treatment, the experimental group had higher mathematical problem-solving ability than the control group, including the improvement and interaction between PjBL implementation and the Early Mathematics Skills (EMS) category.

PELATIHAN PENULISAN KARYA ILMIAH BERSTANDAR JURNAL ELEKTRONIK TERAKREDITASI BAGI GURU DI KABUPATEN MAJALENGKA Nahdi, Dede Salim; Sudirno, Dadang; Jatisunda, Mohamad Gilar; Cahyaningsih, Ujiati; Suciawati, Vici
Jurnal Dharma Bhakti Ekuitas Vol. 6 No. 2 (2022): Jurnal Dharma Bhakti Ekuitas
Publisher : Universitas Ekuitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52250/p3m.v6i2.412

Membuat karya tulis ilmiah merupakan salah satu upaya yang dapat dilakukan guru dalam mengambangkan kompetensi profesionalnya. Dengan menulis karya ilmiah, guru dapat mengembangkan kemampuan menulisnya, mengembangkan diri agar mampu mengintegrasikan gagasan serta menuangkannya secara terstruktur. Namun kenyataanya guru masih kesulitan dalam membuat karya tulis ilmiah. Kondisi ini terlihat dari rendahnya hasil uji kompetensi guru, terutama pada ranah pedagogik dan profesional. Rendahnya kompetensi guru terjadi di beberapa daerah di Indonesia termasuk para guru di Kabupaten Majalengka. Rendahnya kompetensi guru di Kabupaten Majalengka terungkap dari hasil Uji Kompetensi Guru (UKG). Rata-rata hasil UKG Kabupaten Majalengka pada tahun 2018 hanya sebesar 58,91. Kondisi inilah yang menggugah penulis untuk melaksanakan kegiatan Pengabdian berupa pelatihan kepada guru. Kegiatan ini bertujuan untuk melatih guru mampu membuat karya tulis ilmiah yang diterbitkan pada jurnal elektronik. Pelaksanaan pengabdian ini menggunakan seminar, diskusi, pelatihan dan pendampingan. Hasil pengabdian ini menunjukkan adanya peningkatan pemahaman guru mengenai karya tulis ilmiah, khususnya artikel jurnal ilmiah serta meningkatnya jumlah karya ilmiah yang diunggah ke jurnal elektronik.

Combination of mathematical literacy with ethnomathematics: How to perspective sundanese culture Uba Umbara; Sufyani Prabawanto; Mohamad Gilar Jatisunda
Jurnal Infinity Vol 12 No 2 (2023): VOLUME 12, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v12i2.p393-414

Mathematical literacy and ethnomathematics are the two main approaches to understanding mathematics in everyday life. Research on the two aspects should be conducted in an integrated manner. It is expected to be a reference for the development of urban mathematics education based on the social requirements of mathematics and individuals' mathematical competence in a cultural group. The primary goal of this research is to describe the Sundanese people's mathematical literacy through an ethnomathematical perspective. The research is focused on living equipment systems and technology, which is one of the elements of the seven universal culture elements. The study employed phenomenographic and ethnomethodological approaches with a realist ethnographic design. Participant observations and interviews were chosen as data collection techniques, while content analysis, triangulation, and identification of patterns were chosen as data analysis techniques. Ethnomathematics in living equipment systems and technology consists of counting, measuring, explaining, discovering, designing, and explaining activities. The results show that the ethnomathematics of the Sundanese community are relevant to the aspects of mathematical literacy consisting of content, context, and mathematical processes. The study's results emphasize that mathematical literacy and ethnomathematics cannot be separated from daily life.

Proses Berpikir Siswa dalam Menyelesaikan Soal Pemecahan Masalah Berdasarkan Gaya Belajar Jatisunda, Mohamad Gilar; Santoso, Erik; Wiguna, Siska Adi
Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya 2019: Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (873.936 KB)

Penelitian ini dilaksanakan berdasarkan perbedaan setiap siswa dalam proses penerimaan informasi pelajaran yaitu gaya belajar. Fokus pada penelitian ini adalah menganalisis proses berpikir siswa dalam menyelesaikan soal-soal pemecahan masalah berdasarakan gaya belajar. Penelitian ini menggunakan penelitian deskriptif kualitatif. Instrumen pada penelitian adalah rubrik gaya belajar berdasarkan teori Fleming kemudian untuk kemampuan pemecahan masalah matematis didapatkan dari instrumen soal pemecahan masalah matematis berdasarkan pemecahan masalah polya. Hasil penelitian yang didapatkan bahwa siswa dengan gaya belajar visual memiliki kemampuan proses berpikir konseptual, siswa mampu memahami masalah, merencanakan pemecahan masalah, melaksanakan pemecahan masalah dan memeriksa kembali jawaban dengan baik. Siswa dengan gaya belajar auditori memiliki kemampuan yang sama dengan siswa dengan gaya belajar visual yaitu memiliki kemampuan proses berpikir konseptual dengan mampu memahami masalah, merencanakan pemecahan masalah, melaksanakan pemecahan masalah dan memeriksa kembali jawaban dengan baik. Sementara siswa dengan gaya belajar kinestetik memiliki kemampuan pemecahan masalah semi konseptual, siswa tersebut kurang mampu memahami masalah, merencanakan pemecahan masalah, melaksanakan pemecahan masalah dan memeriksa kembali jawaban

Pre-service mathematics teacher conducting prospective analysis: A case study on practice didactical design research Jatisunda, Mohamad Gilar; Suryadi, Didi; Prabawanto, Sufyani; Umbara, Uba
Jurnal Infinity Vol 14 No 1 (2025): VOLUME 14, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v14i1.p21-44

This study aims to understand how pre-service mathematics teachers conduct prospective analyses comprehensively. A qualitative research method with a case study design was used. The participant was Mrs N, a pre-service mathematics teacher who conducted research using DDR methodology in a grade 9 junior high school in Sindang, Majalengka, involving 48 students. Data were collected by analyzing empirical evidence from Mrs. N's prospective analysis process by uncovering the various stages of a prospective analysis. An iterative approach was used to analyze the data by refining the research questions through discussions and regular meetings with Mrs. N. The process ensured adaptability to new insights and understandings from the empirical data. Our findings reveal that the teacher draws upon fundamental philosophical principles from didactical design research, including hermeneutics, phenomenology, and ethnomethodology. By embracing these approaches, the teacher gains valuable insights into conducting research within an interpretive paradigm, allowing for a deeper exploration of the meaning of concepts, the purpose of learning, and the cultural influences that shape the educational process. Additionally, our study sheds light on the emergence of transpositional didactics theory as the prospective teacher delves into understanding the meaning of the geometrics transformation concept.

Pre-service mathematics teacher conducting prospective analysis: A case study on practice didactical design research Jatisunda, Mohamad Gilar; Suryadi, Didi; Prabawanto, Sufyani; Umbara, Uba
Jurnal Infinity Vol 14 No 1 (2025): VOLUME 14, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v14i1.p21-44

This study aims to understand how pre-service mathematics teachers conduct prospective analyses comprehensively. A qualitative research method with a case study design was used. The participant was Mrs N, a pre-service mathematics teacher who conducted research using DDR methodology in a grade 9 junior high school in Sindang, Majalengka, involving 48 students. Data were collected by analyzing empirical evidence from Mrs. N's prospective analysis process by uncovering the various stages of a prospective analysis. An iterative approach was used to analyze the data by refining the research questions through discussions and regular meetings with Mrs. N. The process ensured adaptability to new insights and understandings from the empirical data. Our findings reveal that the teacher draws upon fundamental philosophical principles from didactical design research, including hermeneutics, phenomenology, and ethnomethodology. By embracing these approaches, the teacher gains valuable insights into conducting research within an interpretive paradigm, allowing for a deeper exploration of the meaning of concepts, the purpose of learning, and the cultural influences that shape the educational process. Additionally, our study sheds light on the emergence of transpositional didactics theory as the prospective teacher delves into understanding the meaning of the geometrics transformation concept.

Pre-service mathematics teacher conducting prospective analysis: A case study on practice didactical design research Jatisunda, Mohamad Gilar; Suryadi, Didi; Prabawanto, Sufyani; Umbara, Uba
Jurnal Infinity Vol 14 No 1 (2025): VOLUME 14, NUMBER 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v14i1.p21-44

This study aims to understand how pre-service mathematics teachers conduct prospective analyses comprehensively. A qualitative research method with a case study design was used. The participant was Mrs N, a pre-service mathematics teacher who conducted research using DDR methodology in a grade 9 junior high school in Sindang, Majalengka, involving 48 students. Data were collected by analyzing empirical evidence from Mrs. N's prospective analysis process by uncovering the various stages of a prospective analysis. An iterative approach was used to analyze the data by refining the research questions through discussions and regular meetings with Mrs. N. The process ensured adaptability to new insights and understandings from the empirical data. Our findings reveal that the teacher draws upon fundamental philosophical principles from didactical design research, including hermeneutics, phenomenology, and ethnomethodology. By embracing these approaches, the teacher gains valuable insights into conducting research within an interpretive paradigm, allowing for a deeper exploration of the meaning of concepts, the purpose of learning, and the cultural influences that shape the educational process. Additionally, our study sheds light on the emergence of transpositional didactics theory as the prospective teacher delves into understanding the meaning of the geometrics transformation concept.

Innovative teaching modules utilizing discovery learning to strengthen mathematical problem-solving skills Ismayanti, Syifa; Nurhikmayati, Iik; Jatisunda, Mohamad Gilar
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18981

This research aims to strengthen students' mathematical problem-solving skills by creating teaching modules based on the Discovery Learning approach. Because traditional teaching approaches often fail to engage students effectively, the development of this module is essential. In our research, we use research and development (R&D) techniques with 4D models up to the Development stage, which concentrates on module design and testing. Based on the findings of the validity test, media experts got a score of 73%, while material experts got a score of 87%. The criteria used include relevance, completeness, ease of understanding, suitability for discovery learning, and problem-solving skills. Meanwhile, practicality received an average score of 93.5% from teachers and students. Therefore, modules can be considered legitimate and useful, and are expected to improve student engagement and problem-solving skills. Through this research, it is hoped to significantly advance mathematics education with the creation of more creative teaching strategies. The findings provide a foundation for future studies to refine and expand Discovery Learning-based instructional materials in mathematics education.

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