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Yaya S. Kusumah

Universitas Pendidikan Indonesia, Bandung, Indonesia

Author-ID : 303105

Arts Humanities Computer Science & IT Education Languange, Linguistic, Communication & Media Mathematics Public Health Social Sciences Other

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CARA IDENTIFIKASI PENGETAHUAN PROSEDURAL DAN PEMAHAMAN KONSEPTUAL MAHASISWA TERHADAP MATERI LIMIT Mulyono, Budi; Kusumah, Yaya S; Rosjanuardi, Rizky
Mathematics Education Journal Vol. 13 No. 1 (2019): Jurnal Pendidikan Matematika
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

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

Limit is the main topic in calculus which is already introduced and thought to students since senior high school level. However, quite a lot of students find difficult to learn and to understand limit at the first year of university level. This article discusses how to identify student’s procedural-knowledge and conceptual- understanding about limit. The method used to identify student’s procedural-knowledge and conceptual- understanding about limit was by giving a test to students about limit problems. The problems were designed so simple in order to avoid mistakes that students made because of the difficulty of questions. The finding of test results show that there were some students whom could answer questions about limit procedurally well, but they had problem to solve questions about limit related to conceptual understanding. This problem could be caused by the learning about limit when they were at senior high school level only focused on how to solve questions about limit procedural.DOI: 10.22342/jpm.13.1.6706.73-82

Students' Learning Obstacles in SPLDV Materials Related to Computational Thinking Skills Prasetyawan, Enggar; Kusumah, Yaya S.; Prabawanto, Sufyani
Jurnal Gantang Vol 10 No 1 (2025): Jurnal Gantang
Publisher : Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jg.v10i1.7168

Integrating computational thinking into Programme for International Student Assessment (PISA) assessments presents a significant challenge for Indonesian students, particularly in mathematics education. Despite its crucial role in problem-solving, computational thinking has not been widely implemented by students due to the presence of learning obstacles. This study aims to identify the learning obstacles that junior high school students encounter in understanding systems of linear equations in two variables, specifically about their computational thinking abilities. A qualitative approach with a phenomenological method was employed. Research instruments included a computational thinking test and a semi-structured interview guide. Data were collected from 20 students at a junior high school in Wonosobo Regency, Indonesia. Data analysis consisted of three stages: reduction, display, and conclusion. The findings reveal that students experience three types of learning obstacles—epistemological, ontogenical, and didactical when engaging with systems of linear equations in two variables, indicating that these obstacles hinder the development of their mathematical computational thinking skills.

Analisis Kemampuan Spatial Siswa Sekolah Menengah Pertama Berdasarkan Teori Hubert Maier Teapon, Nurhuda; Kusumah, Yaya S
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 6 No. 2 (2023): Matematika dan Pendidikan Matematika: Permasalahan dan Solusinya
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v6i2.2796

Spatial Ability berperan penting dalam mengembangkan kemampuan matematika siswa. Siswa yang memiliki kemampuan spatial yang baik tampil lebih baik dalam matematika daripada siswa dengan kemampuan spasial yang kurang baik. Spatial ability atau kemampuan spasial terdiri dari beberapa elemen. Berdasarkan teori Hubert Maier, beberapa elemen spatial ability adalah persepsi spasial, visualisasi, rotasi mental, hubungan spasial, dan orientasi spasial. Penelitian ini dilakukan dengan menggunakan metode deskriptif kualitatif. Tujuan dari penelitian ini adalah menganalisis keterampilan spasial siswa sekolah menengah pertama berdasarkan teori Peter Hubert Maier. Dalam penelitian ini menggunakan metode kualitatif dan siswa sekolah menengah pertama kelas IX menjadi subjek penelitian. Berdasarkan analisis data yang ditemukan dilapangan, ditemukan bahwa keterampilan spasial umum siswa cukup lemah. Melihat permasalahan yang dihadapi oleh siswa tersebut, langkah selanjutnya dari penelitian ini adalah merancang dan melakukan eksperimen yang berfokus pada pembelajaran matematika, yang secara khusus ditujukan untuk meningkatkan kemampuan spasial siswa.

PROFIL KEMAMPUAN SISWA DALAM MENYELESAIKAN SOAL PENJUMLAHAN DAN PENGURANGAN PECAHAN Ate, Dekriati; Moza, Florida; Kusumah, Yaya Sukjaya
JP2MS Vol 7 No 2 (2023): Agustus
Publisher : Program Studi S1 Pendidikan Matematika FKIP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jp2ms.7.2.192-199

Salah satu kebijakan pendidikan merdeka belajar adalah Asesmen kompetensi minimum dan survey karakter. Untuk asesmen kompetensi minimum, kompetensi yang diuji adalah kemampuan literasi numerasi. Agar siswa dapat memiliki kemampuan ini, maka terlebih dahulu siswa harus menguasai konsep dasar berhitung. Tujuan dari penelitian ini adalah mendeskripsikan kemampuan siswa kelas VI dalam menyelesaikan soal perhitungan penjumlahan dan pengurangan pecahan. Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek penelitian adalah siswa kelas VI SDK Bali Loura. Data dikumpulkan melalui tes. Hasil penelitian menunjukkan bahwa hanya 30% siswa yang mampu menyelesaikan soal penjumlahan dan pengurangan dengan penyebut sama maupun penyebut berbeda, sedangkan 70% siswa melakukan kesalahan; 28% siswa mampu menyelesaikan soal penjumlahan dan pengurangan pecahan yang berpenyebut sama maupun penyebut berbeda, sedangkan 72% siswa melakukan kesalahan. Tipe kesalahan siswa meliputi kesalahan prosedur dan kesalahan konsep.

Potret kemampuan penalaran spasial serta persepsi siswa sekolah menengah pertama terhadap geometri dan matematika Fitriyani, Harina; Kusumah, Yaya Sukjaya; Dahlan, Jarnawi Afgani; Hendroanto, Aan
AKSIOMA : Jurnal Matematika dan Pendidikan Matematika Vol 16, No 1 (2025): AKSIOMA: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/aks.v16i1.21395

Geometry is a field of mathematical study closely related to spatial reasoning and its many uses in everyday life. The purpose of this study was to photograph the spatial reasoning ability of junior high school students in doing spatial tasks from a gender perspective and their perceptions of the geometry material and mathematics. A qualitative approach was chosen to describe the research findings. One hundred two junior high school students in Sleman Yogyakarta participated in spatial reasoning tests, interviews, and questionnaires. Data analysis uses data reduction, data presentation, and verification stages. The results showed that the average student's spatial reasoning ability was still low, 42.09. Most students mastered spatial tasks in spatial orientation, while the students' mastery of spatial reasoning was the weakest in the element of spatial visualization. From a gender perspective, male students showed superior spatial reasoning abilities than female students. Students perceive mathematics and geometry as complex materials, but they are essential to learning because of their many benefits in everyday life.

Application of Newman’s Error Analysis to Identify Students’ Errors in Solving Fraction Problems Payung, Zatman; Kusumah, Yaya Sukjaya; Mulyaning, Endang Cahya; Avip, Bambang
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.27320

Mathematics is a subject that has been taught since elementary school with the aim of training students to think critically, logically, systematically, and solve problems. In fact, many students experience difficulties in learning mathematics, especially in fractional material This study aims to identify mistakes made by elementary school students in solving fractional problems using Newman's Error Analysis (NEA). Through a descriptive qualitative approach, this study analyzes the results of student work on fractional questions based on five stages of NEA: reading error, comprehension error, transformation error, process skills error, and encoding error). Data was collected through written tests and interviews, involving students from UPI Laboratory Elementary School, Pelita Bangsa Elementary School, and SDN 272 Sukasari. Student errors are then grouped by NEA stages to identify the most mistakes made by students. The results of the study showed that students made mistakes at all stages of the NEA. The most common mistakes experienced by students are at the comprehension error and process skill error stages. There are still many students who are not able to represent fractions with pictures and students also still make many mistakes in the fraction operation process. Based on the results of the research, it was concluded that students still had difficulties in fractional material by seeing the mistakes made by students when working on fractional problems. It is necessary to improve students' conceptual understanding and procedural skills in fractional materials.

Concept of Triangle: Examples of Mathematical Abstraction in Two Different Contexts Nurhasanah, Farida; Kusumah, Yaya S.; Sabandar, Jozua
International Journal on Emerging Mathematics Education IJEME, Vol. 1 No. 1, March 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/ijeme.v1i1.5782

Geometry has abstract notions to be learnt so that all those notions cannot be just transferred into students' mind like a bunch of information that should be memorized. Students need to construct those concepts during their learning process. This process of knowledge construction can be considered as an abstraction process. This study aimed to qualitatively compare abstraction process of students who learned the topic of triangle in conventional method and in van Hiele model of teaching aided by Geometers' sketchpad. Subjects of this study were junior high school students in grade 7. This is a qualitative study with grounded theory design. Data were collected through classroom observation, test, and task-based interview. Results of the study show that theoretical abstraction processes tend to dominate classrom with conventional method of teaching while classroom with van Hiele model of teaching aided by Geometers' sketchpad accommodated empirical abstraction process of the students.

Spatial Reasoning: A Survey on the 8th Grader Students' Gain in Online Learning Fitriyani, Harina; Kusumah, Yaya Sukjaya; Turmudi, Turmudi
International Journal on Emerging Mathematics Education IJEME, Vol. 5 No. 1, March 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/ijeme.v5i1.20140

Coronaviruses disease (Covid-19) pandemic forces schools to implement schools from home through online learning. This study aims to describe online mathematics learning, examine differences in aspects of spatial reasoning, and spatial reasoning based on gender. We conducted a survey method on 140 participants in one private junior high school in Yogyakarta. Data collection using an spatial reasoning test via Google Form consist of nine questions and direct interview with a teacher through video conference. Data analysis uses descriptive and inferential statistics. The results showed that online mathematics learning using the Google Form platform can assist students with limited facilities in learning process. The research finding showed no difference in spatial reasoning ability between male and female students, including in each aspect of spatial reasoning. In addition, other findings indicate that the aspect of spatial reasoning that students master the most is spatial visualization, while the aspect of spatial reasoning that is the least mastered by students is spatial relations.

Mathematics Teachers' Competency Development: A Qualitative Study On The Transition From PMM To Ruang GTK Ikram, Fadhil Zil; Kusumah, Yaya Sukjaya; Putri, Mei Radia
Information Technology Education Journal Vol. 4, No. 2, May (2025)
Publisher : Jurusan Teknik Informatika dan Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59562/intec.v4i2.8168

The change from PMM (Merdeka Mengajar Platform) to Ruang GTK requires further study investigating how the Ruang GTK is utilised compared to PMM. The present qualitative study aims to describe the experiences of 15 mathematics teachers (13 teachers and two vice principals) in using Ruang GTK compared to their previous experiences using PMM. The study spanned six weeks and was conducted online and offline. The data were collected through interviews and audiovisual materials, with interview guidelines developed based on an adaptation of the Technology Acceptance Model (TAM3) constructs: perceived usefulness, perceived ease of use, job relevance, voluntariness, and use. The data underwent a three-stage analysis process, encompassing data condensation, data presentation, verification, and conclusion drawing. The results showed that more and more participants rarely use Ruang GTK due to motivational factors, changes in the curriculum, and the need to attend many offline trainings. The discrepancy in the advantages accruing from utilizing Ruang GTK compared to PMM can be attributed to the substantial diminution in teacher workload. Ruang GTK is easier to operate, especially because it eliminates features that confuse teachers. Lastly, many of the participants now access the Ruang GTK only when there is an obligation or demand from their superiors, and only a few

Membangun Percaya Diri Siswa dalam Matematika: Tinjauan Sistematis Model Pembelajaran untuk Meningkatkan Self-Efficacy Sardin, Sardin; Kusumah, Yaya Sukjaya; Martadiputra, Bambang Aviv Priatna
Juring (Journal for Research in Mathematics Learning) Vol 8, No 1 (2025)
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/juring.v8i1.35431

Penelitian ini bertujuan untuk mengkaji secara sistematis model pembelajaran yang berkontribusi terhadap peningkatan self-efficacy siswa dalam pembelajaran matematika. Metode yang digunakan adalah Systematic Literature Review (SLR) terhadap 33 artikel dari jurnal pendidikan matematika terakreditasi SINTA 2 dan 3 di Indonesia selama periode 2015–2024. Hasil kajian menunjukkan bahwa model pembelajaran seperti Problem Based Learning (PBL), CORE, Team Assisted Individualization (TAI), pembelajaran berbantuan Geogebra, RME, dan Reciprocal Teaching terbukti efektif dalam meningkatkan self-efficacy matematis siswa. Model PBL menjadi yang paling dominan karena berorientasi pada pemecahan masalah yang melibatkan partisipasi aktif siswa, menumbuhkan rasa percaya diri, dan memperkuat keyakinan akan kemampuan diri. Penelitian ini menegaskan pentingnya pemilihan model pembelajaran yang tepat dalam membentuk efikasi diri siswa dan merekomendasikan PBL sebagai alternatif utama dalam pengembangan pembelajaran matematika yang humanis dan bermakna.

Co-Authors 'Ulya, Zahratul Aan Hasanah Aan Hendroanto Adjis, Vidia Amalia Aini, Siti Al Jupri, Al Jupri Andini, Meri Ani Minarni Anik Yuliani Ariyanti Jalal Astri Wahyuni Ate, Dekriati Atma Murni Avip, Bambang Bainuddin Yani Bambang Avip Priatna Martadiputra Bambang Avip Priatna Martadiputra cakrawala Bana Goerbana Kartasamita Bonita Hirza Bonyah, Ebenezer Cohors-Fresenborg, Elmar Dadan Dasari Dadang Juandi Dahlan, Jarnawi Afghani Dahlia Fisher Darhim Darhim Deswita, Ria Deswita, Ria Dewi, Nuriana Rahmani Didi Suryadi Dina Mayadiana Suarma, Dina Mayadiana Dini Kinati Fardah Ditasona, Candra Dwicahyo, Larasati Adira E. Elvis Napitupulu, E. Elvis Edy Surya Elah Nurlaelah Elmawati, Elmawati Elsayed, Ebrahim E. Endang Cahya Mulyaning A. Epran, Epran Erma Monariska Ernawati Fadhil Zil Ikram Farida Nurhasanah Fatimah, Siti Finola Marta Putri Fitriyani, Harina Florida Moza, Florida Gí¼rbí¼z, Ferit Harina Fitriyani Hendriyanto, Agus Hepsi Nindiasari Heri Sutarno Idrus Alhaddad Ilham Muhammad Isra Nurmai Yenti Jarnawi Afgani Dahlan Jozua Sabandar Jozua Sabandar Kartika Yulianti Kurnia Putri Sepdikasari Dirgantoro Kurniati Kurniati Kusaka, Satoshi Kusnandi Kusnandi Kusnandi, Kusnandi Kyaruzi, Florence Lussy Midani Rizki Maknun, Churun Lu'lu'il Margaretha Madha Melissa Marlina Martadiputra, Bambang Aviv Priatna Muhaimin, Lukman Hakim Mulyono, Budi N. Nurjanah Nafiah, Siti Nanang Priatna Napitupulu, E.Elvis Nia Kania Nita Delima NurAfni NurAfni Nurwita, Faizah Pakaya, Yusril Mahendra Panjaitan, M. Azhari PRASETYAWAN, ENGGAR Prida N. L. Taneo Putri, Mei Radia Rachmawati, Andini Dwi Rahayu, Diar Veni Rahmah Johar Ratni Purwasih, Ratni Reviandari Widyatiningtyas, Reviandari Rizky Rosjanuardi Rohati Rohati Sabandar, Jozua Sahara, Sani Said Husain, Sharifah Kartini Saputri, Veni Sardin Sari, Fitri Aida Sartika, Rahma Adinda Silitonga, R. H. Yanti Siswanto, Rizki Dwi Stevi Natalia, Stevi Suarka, Ni Komang Savitri Dharma Sudirman Sudirman Sufyani Prabawanto, Sufyani Sugiman Sugiman Suhendra Suhendra Sulistiawati Sulistiawati Swasti Maharani, Swasti Tatang Herman, Tatang Teapon, Nurhuda Tirtayasa, Fajar Tupamahu, Pieter Z. Turmudi Turmudi, T Utari Sumarmo Vos, Hans Wijaksana, Aris Hadiyan Yelli Oktavien Yuliardi, Ricki Yumiati Zaenal Arifin Zafrullah, Zafrullah Zatman Payung Zulkardi Zulkardi

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