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Ferry Ferdianto

Pendidikan Matematika, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Swadaya Gunung Djati

Author-ID : 447060

Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Designing a digital teaching module based on mathematical communication in relation and function Setiyani; Putri, Dian Permana; Ferdianto, Ferry; Fauji, Sandi Hermana
Journal on Mathematics Education Vol. 11 No. 2 (2020): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

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The purpose of this study is to design a digital module based on mathematical communication skills. This a development research which is carried out to determine the use of poor learning media and students’ low comprehensive skills in understanding mathematical topics associated with relations and functions. One of the solutions used to overcome this problem is by designing a digital teaching module using media. The research and development method consisting of Analysis, Design, Development, implementation, and Evaluation (ADDIE), were used to carry out this study. The results showed that the digital module is highly valid with a total expert validation of 95.1% and in the very good category. Also, the students' response to the digital module is in the very good category, with a total response criterion of 89.8%. Therefore, the designed digital module has the ability to improve students' independence in learning because its use is not limited to classrooms.

How Self-Efficacy Shapes Mathematical Analytical Thinking: A Qualitative Study using Action-Process-Object-Schema Theory Gunawan, Gunawan; Ferdianto, Ferry; Untarti, Reni; Akhsani, Lukmanul
Jurnal Pendidikan MIPA Vol 26, No 1 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i1.pp754-778

Analytical thinking enables students to solve complex problems in a systematic and measurable manner. This study examined students' analytical thinking processes in relation to self-efficacy using the Action-Process-Object-Schema (APOS) theory. The researchers employed a qualitative method with an explanatory approach. They selected mathematics education students from Universitas Muhammadiyah Purwokerto who were enrolled in a sequence convergence course as research subjects. To collect data, the researchers used analytical thinking tests, questionnaires, and interviews. Based on the self-efficacy questionnaire, the researchers classified students into high, medium, and low self-efficacy groups. They selected one informant from each category using purposive sampling. The data analysis involved three stages: data reduction, presentation of findings, and interpretation. The analytical thinking process included collecting, differentiating, organizing, and attributing. The findings showed that students in the high and medium self-efficacy groups demonstrated strong analytical thinking skills. They successfully completed all stages—collecting, differentiating, organizing, and attributing. In contrast, students with low self-efficacy lacked adequate prior knowledge and required assistance in applying mathematical concepts and completing proofs during the organizing stage. These students gathered only limited information at the collection stage due to a poor understanding of the main problem. As a result, they could only partially complete each stage of the analytical thinking process. Keywords: analytic thinking process, APOS theory, self-efficacy.

DEVELOPMENT OF ETHNOMATHEMATICS BASED DIGITAL LEARNING MEDIA ON THE SARON MUSICAL INSTRUMENT Muslimah, Nur Annisa; Hotiah, Herera; Aminah, Neneng; Ferdianto, Ferry
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 14, No 3 (2025)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v14i3.12766

Mathematics learning is still separated from local culture, and the concept of ethnomathematics is rarely applied in education, particularly in the context of traditional musical instruments. This research is essential to implement to present contextual and meaningful learning media through a cultural approach. This study aims to develop and assess the feasibility of the GEETNOSAR (Google Sites Ethnomathematics Saron) learning media. This research employs the R&D (Research & Development) method with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). The subjects of the study consisted of 32 eleventh-grade students at SMAN 1 Cilimus. The data collection techniques used in this research are questionnaires, interviews, observations, and documentation.. Based on the research results, it was concluded that the GEETNOSAR learning media was successfully developed and received a score with very valid criteria based on assessments from media experts, content experts, and student responses, amounting to 92.5%. Thus, GEETNOSAR has proven to be suitable for use as contextual and engaging mathematics learning media. It can serve as an innovative learning tool that integrates the potential of local culture with advancements in digital technology, thereby providing meaningful learning experiences for students.

Student Profile of Mathematical Communication Process of Prospective Mathematics Teachers Reviewed from Self-Confidence Gunawan, Gunawan; Ferdianto, Ferry; Untarti, Reni; Akhsani, Lukmanul
Mosharafa: Jurnal Pendidikan Matematika Vol. 13 No. 4 (2024): October
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/mosharafa.v13i4.1958

Abstrak Kepercayaan diri merupakan salah satu aspek afektif yang penting dalam meningkatkan komunikasi matematis. Penelitian ini bertujuan untuk menganalisis proses komunikasi matematis calon guru matematika dalam memecahkan masalah berdasarkan kepercayaan diri. Metode yang digunakan adalah kualitatif. Subyek penelitian adalah mahasiswa Pendidikan Matematika, Universitas Muhammadiyah Purwokerto. Instrumen penelitian terdiri dari angket, tes, dan wawancara. Hasil angket kepercayaan diri dikategorikan dalam tinggi, sedang, dan rendah. Setiap kategori mengambil satu orang sebagai responden. Analisis data menggunakan tahap reduksi, penyajian, dan kesimpulan. Hasil penelitian menunjukkan siswa kategori kepercayaan diri tinggi dan sedang memiliki karakteristik proses komunikasi yang baik. Siswa menggunakan simbol dengan tepat untuk menjelaskan informasi dan masalah yang diketahui serta menuliskan jawaban secara terperinci. Siswa kategori kepercayaan diri rendah membutuhkan bantuan untuk menerjemahkan informasi dan simbol matematika. Hal ini mengakibatkan kesulitan dalam menyelesaiakan masalah dengan tepat. Kondisi ini menunjukkan bahwa tahap identifikasi informasi dan representasi masalah sebagai kunci awal proses komunikasi matematika. Abstract Self-confidence is one of the important affective aspects in improving mathematical communication. This study aims to analyze the mathematical communication process of prospective mathematics teachers in solving problems based on confidence. The method used is qualitative. The subject of the study is a student of Mathematics Education, Universitas Muhammadiyah Purwokerto. The research instrument consisted of questionnaires, tests, and interviews. The results of the confidence questionnaire are categorized into high, medium, and low. Each category takes one person as a respondent. Data analysis uses reduction, presentation, and conclusion stages. The results showed that students in the high and medium confidence categories had the characteristics of a good communication process. Students use symbols appropriately to explain known information and problems and write down answers in detail. Students in the low confidence category need help translating mathematical information and symbols. This results in difficulties in solving problems appropriately. This condition shows that the stage of information identification and problem representation is the initial key to the mathematical communication process.

Analisis kemampuan pemahaman matematis siswa SMP pada materi sistem persamaan linear dua variabel Oktoviani, Vika; Widoyani, Wiris Laras; Ferdianto, Ferry
Edumatica : Jurnal Pendidikan Matematika Vol 9 No 1 (2019): Edumatica: Jurnal Pendidikan Matematika (April 2019)
Publisher : Department of Mathematics Education, Faculty of Teacher Training and Education, Universitas Jambi

Abstrak Penelitian ini bertujuan untuk mendeskripsikan kemampuan pemahaman matematis siswa SMP pada materi sistem persamaan linear dua variabel (SPLDV). Hal ini didasarikarena masih banyak siswa yang kurang memahami konsep SPLDV sehingga siswa merasa kesulitan dalam memecahkanmasalah matematis. Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek dalam penelitian ini adalah siswa SMP.Teknik pengumpulan data menggunakan teknik tes berupa soal uraian yang berjumlah 4 soal dan tiap soal mewakili masing â€“ masing indikator kemampuan pemahaman matematis. Hasil penelitian menunjukkan bahwa (1) Kemampuan pemahaman matematis pada indikator menyatakan ulang sebuah konsep, secara keseluruhan siswa dapat menjawab dengan benar sehingga mencapai tingkat pemahaman yang baik (2) Kemampuan pemahaman matematis pada indikatormengaplikasikan konsep atau algoritma terhadap penyelesaian masalah, siswa dapat membentuk model matematika, kemudian melakukan perhitungan, namun adakesalahan dimana siswa belum mampumenginterpretasikan masalah yang di berikan dengan tepat. Kata kunci: kemampuan pemahaman matematis, siswa SMP, SPLDV. Abstract This study aims to describe the ability of mathematical understanding of junior high school students in the material system of two variable linear equations (SPLDV). This is based on the fact that there are still many students who do not understand the concept of SPLDV so students feel difficulties in solving mathematical problems. This research is a qualitative descriptive study. The subjects in this study were junior high school students. The data collection technique uses a test technique in the from of a description question which amounts to 4 questions and each questions represent each indicator of mathematical understanding. The result showed that (1) the ability of mathematical understanding on the indicator restated a concept, as a whole students could answer correctly so that they reached a good level of understanding (2) the ability of mathematical understanding of indicators applying concepts or algorithms to problem solving, students could form models mathematics, then do calculations, but there are errors where students have not been able to interpret the problem given correctly. Keywords: ability of mathematical understanding, junior high school students, SPLDV

Pemberdayaan Ekonomi Perempuan Berbasis UMKM Melalui Konsep Membangun Learning Community Activity Center Kelompok Wanita Tani (KWT) Desa Belawa Kecamatan Lemahabang Kab.Cirebon Suzana, Anna; Ferdianto, Ferry; Budianto, Erwin; Fadilah, Muhamad Kahfi; Triana, Sabrina Dinda
Jurnal Pintar Abdimas Vol 2 No 2 (2022): Volume 2 Nomor 2 Tahun 2022
Publisher : Lembaga Pengabdian Masyarakat Universitas Swadaya Gunung Jati

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Di Indonesia, peranan perempuan dalam perekonomian semakin hari semakin signifikan. Belawa adalah desa di kecamatan Lemahabang, Cirebon, Jawa Barat, Indonesia. Desa Belawa ini memiliki komunitas wanita selain PKK (Pemberdayaan dan Kesejahteraan Keluarga), yaitu KWT (Kelompok Wanita Tani) yang terdiri dari wanita- wanita petani atau isteri petani. konsep pemberdayaan oleh tim dosen Universitas Swadaya Gunungjati Cirebon (UGJ) pemberdayaan perempuan dan komunitas perempuan berbasis UMKM dalam meningkatan minat usaha keluarga. Kegiatan ini bertujuan untuk memberdayakan ekonomi perempuan anggota KWT melalui pembangunan learning community activity center yang dapat meningkatkan keterampilan kewirausahaan, pemanfaatan media sosial, dan pengembangan produk berbasis UMKM. Metode dan tahapan dalam pelaksanaan Program PKM pemberdayaan ekonomi perempuan berbasis umkm dilakukan dengan cara : pendekatan partisipatif (Partisipatory Approach)dan pemberdayaan Masyarakat (Empowerment Approach). Kesimpulan penelitian ini yaitu berhasil meningkatkan partisipasi dan kesadaran anggota KWT tentang pentingnya pembelajaran berkelanjutan dalam pengembangan usaha.

Analisis Kesalahan Siswa dalam Menyelesaikan Soal Pada Materi SPLDV Ditinjau dari Indikator Kemampuan Matematis Ferdianto, Ferry; Yesino, Leonardus
SJME (Supremum Journal of Mathematics Education) Vol 3 No 1 (2019): January 2019
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v3i1.1335

Penelitian ini bertujuan untuk mengetahui jenis dan penyebab kesalahan siswa dalam menyelesaikan soal pada materi SPLDV yang ditinjau dari indikator kemampuan matematis. Populasi dalam penelitian ini adalah siswa kelas XI SMA Negeri 1 Kadugede Tahun Pelajaran 2017/2018. Pemilihan sampel dengan cara quota sampling, diperoleh siswa kelas XI sebanyak 36 orang. Pengambilan data diperoleh dengan menggunakan metode tes untuk menentukan kemampuan pemecahan masalah matematis siswa yang kemudian dianalisis dengan uji perbedaan rata-rata. Hasil penelitian menunjukan bahwa: 1) Kesalahan dalam memahami masalah sebesar 43,1%; 2) Kesalahan dalam merencanakan penyelesaian dan menyelesaikan masalah sesuai rencana sebesar 53,3%; 3) Kesalahan dalam menyelesaikan masalah sesuai rencana sebesar 39,8%; 4) Kesalahan dalam membuat model matematika, menyelesaikan dan melakukan pengecekan jawaban sebesar 61,1%.DOI: https://doi.org/10.31235/osf.io/kmwg6

IMPLEMENTASI MARKET DAY SEBAGAI SARANA PEMBELAJARAN KEWIRAUSAHAAN BAGI SISWA SEKOLAH DASAR Muniifah; Habiibah; Shella Dhiya Ulhaq; Zulfa Afifah Afra; Ferry Ferdianto
Satya Widya Vol. 41 No. 2 (2025)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/j.sw.2025.v41.i2.p208-219

Strengthening entrepreneurial literacy from the elementary level plays a strategic role in shaping independent, creative, and socially responsible learners. This study aims to describe the implementation of the Market Day activity as a learning medium for entrepreneurial literacy at SD Negeri Pangrango. The research employed a descriptive qualitative method with data collected through observation, interviews, and documentation. The subjects consisted of fifth-grade students, teachers, and the school principal. The results show that Market Day provided enjoyable and contextual learning experiences, effectively improving students’ understanding of basic economic concepts such as capital, selling price, and profit. Moreover, the activity cultivated entrepreneurial character values including honesty, responsibility, teamwork, and independence. The implementation of Market Day also strengthened the dimensions of the Pancasila Student Profile, particularly cooperation, creativity, and self-reliance. This activity not only enhanced students’ economic and communication skills but also fostered positive social and moral attitudes. Therefore, Market Day can serve as an innovative, contextual, and project-based learning model that supports the development of character and entrepreneurial competence in elementary school students and aligns with the principles of the Merdeka Curriculum.

OPTIMIZING PLASTIC WASTE MANAGEMENT THROUGH DECOMPOSITION EDUCATION AND ECOBRICK IMPLEMENTATION IN KEDUNGBOKOR VILLAGE Ferry Ferdianto; Nurochman Andika; Muhammad Dzaky Noer Raehan; Bakhtiar Rifai; Lovania Haristiana
Jurnal Abdisci Vol 3 No 6 (2026): Vol 3 No 6 Tahun 2026
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/abdisci.v3i6.1182

Background. Waste problems remain an environmental challenge in rural communities, including Kedungbokor Village, Larangan District, Brebes Regency. Low public awareness of waste sorting and limited educational media on waste decomposition times lead to suboptimal waste management. Aims. This community service activity aims to increase community knowledge and participation in inorganic waste management by providing educational media on waste decomposition and training in making ecobricks. Methods. The implementation method uses a participatory approach, which includes the stages of problem identification, socialization, environmental education, application of simple technology, mentoring, and evaluation of activities. Result. The results of the activity show the installation of educational media on the decomposition times of various types of waste as a permanent source of information in the village environment, and the community's implementation of ecobrick-making practices. Conclusion. This program also increases public understanding of the importance of waste sorting and reducing plastic waste through the 3R (Reduce, Reuse, Recycle) principle. Implementation. This activity made an initial contribution to raising community environmental awareness, although the program's sustainability required continuous support from the village government and active community participation.

EKSPLORASI ETNOMATEMATIKA PADA KESENIAN RAMPAK KENDANG DI CIREBON: STUDI ETNOGRAFI DI SANGGAR GRIYA SUPER Ferry Ferdianto; Choirunnisa Rinnatullaili; Romziyah Vidyani
Euclid Vol 13 No 2 (2026)
Publisher : Lembaga Penelitian Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/e.v13i2.12798

This study explores mathematical practices in Rampak Kendang at Sanggar Griya Super, Gegesik Kulon, Cirebon, by viewing culture as a knowledge system with its own logic. A qualitative ethnographic approach was employed through observation, semi-structured interviews, visual documentation, and field notes. The main participants were trainers and studio members purposively selected based on their involvement, experience, and knowledge of Rampak Kendang. The analysis used Bishop’s six mathematical activities as sensitizing concepts while distinguishing practitioners’ emic meanings from the researcher’s etic representations. The findings show that mathematics is integrated into tepak structures, eight-beat periodicity, spatial reasoning in formation changes, body- and movement-space-based measurement, and proportional reasoning in technical performance needs. Counting, locating, measuring, designing, playing, and explaining form an embodied and collective network of temporal-spatial actions. The findings affirm that Rampak Kendang is a cultural practice in which mathematical knowledge is enacted. It therefore has potential as a contextual resource for culturally based mathematics learning, linking patterns, periodicity, measurement, proportion, and spatial reasoning with formal mathematical representations without diminishing cultural meaning.

Co-Authors Ade Citra Irawanti Anggita Maharani Anggita Maharani Bakhtiar Rifai Budianto, Erwin Choirunnisa Rinnatullaili Devi Heryanti Dian Permana Putri Dina Pratiwi Dwi Santi Erawati, Turini Fadilah, Muhamad Kahfi Fathiy, Naufal Zahiril Fauji, Sandi Hermana Fauzi Mulyatna Frisca Shella Fadiyah Ghanny Ghanny Ghanny, Ghanny Gunawan Gunawan Gunawan Gunawan Habiibah Hotiah, Herera Irawanti, Ade Citra Iwan Junaedi Jaufillaili . Laela Sagita Laela Sagita Leonardus Yesino Lovania Haristiana Lukmanul Akhsani M. Dadan Sundawan Mila Nuryah Misni Misni Mohammad Dadan Sundawan, Mohammad Dadan Muhammad Dzaky Noer Raehan Mulyono Mulyono Muniifah Muslimah, Nur Annisa Neneng Aminah Nurochman Andika Nurul Ikhsan Karimah Oktoviani, Vika Pertiwi, Budi Wahyu Pinkan Pramesti Putra, Sandy Dwiana Raissa, Indira Ratna Yulia, Ervika Reni Untarti Rizal Fahmy Fasya Romziyah Vidyani Sandi Hermana Fauji Setiyani Setiyani Setiyani Setiyani Setiyani Setiyani Setyani, Setiyani Shella Dhiya Ulhaq Siti Latifah Sofi Saifiyah Soleha Soleha Sri Sumarwati Sumarwati, Sri Supriyadi Supriyadi Sutyani, Tiana Suzana, Anna Triana, Sabrina Dinda Trusti Hapsari Umar Soleh Utami, Rini Vika Oktoviani Widoyani, Wiris Laras Wiris Laras Widoyani Yesino, Leonardus Yohanes Leonardus Sukestiyarno Yulia Citra, Yulia Zulfa Afifah Afra

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