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Yaya S. Kusumah

Universitas Pendidikan Indonesia, Bandung, Indonesia

Author-ID : 303105

Agriculture, Biological Sciences & Forestry Arts Humanities Chemistry Computer Science & IT Education Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Relational Thinking Test Instrument Analysis: Transition from Arithmetic to Algebra Andini, Meri; Jupri, Al; Kusumah, Yaya S.
Unnes Journal of Mathematics Education Vol. 14 No. 2 (2025): Reguler Issue
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ujme.v14i2.23360

Relational thinking, a cognitive approach bridging arithmetic thinking and algebraic thinking, has been developed by numerous researchers through mathematics learning processes to address students' difficulties in learning algebra. This study aims to develop a relational thinking test instrument for students and conduct both quantitative and qualitative analyses to measure relational thinking abilities in a valid and reliable manner. The research methodology adapts the development model proposed by Gall and Borg (2003) regarding the process of developing and validating products (test instruments), involving 64 seventh-grade students. Data analysis involved validity and reliability tests as well as analysis of students' written responses. The results indicate that the test instrument is valid (except for test item P8) and reliable, with a coefficient of α = 0.69 (high). Revisions were made to several items that were invalid or less valid based on quantitative and qualitative analysis. The revised instrument can be considered a good relational thinking test instrument, though it is recommended to support it with non-test results (such as interviews) to enhance accuracy and observe students' thinking consistency.

FLIPPED CLASSROOM IN MATHEMATICS EDUCATION AFTER PANDEMIC: A SYSTEMATIC LITERATURE REVIEW Putri, Finola Marta; Juandi, Dadang; Kusumah, Yaya Sukjaya; Martadiputra, Bambang Avip Priatna; Kusnandi, Kusnandi
ALGORITMA: Journal of Mathematics Education Vol. 7 No. 1 (2025): ALGORITMA Journal Of Mathematics Education
Publisher : Faculty of Educational sciences, UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/ajme.v7i1.46721

Abstract The COVID-19 pandemic has highlighted the need for adaptive learning models, especially in mathematics education. This study aims to analyze publications on the Flipped Classroom model in post-pandemic mathematics education (2021–May 2023) and to explore its future development. The method used is a systematic literature review of 10 articles, consisting of two Scopus-indexed articles and eight articles from Google Scholar obtained using the Publish or Perish application. The total number of participants involved in the reviewed studies is 1,200, comprising 370 elementary school students, 208 junior high school students, 179 senior high school students, and 417 university students. The findings indicate that the digital-based Flipped Classroom model can enhance mathematical communication skills, critical thinking, conceptual understanding, problem-solving abilities, and higher-order thinking. Moreover, it positively influences students' self-confidence, creates a more interactive classroom environment, generates positive learning responses, and supports social interaction in online settings. These results suggest that the Flipped Classroom is an effective instructional model and is recommended for mathematics learning in the post-pandemic era. Abstrak Pandemi COVID-19 mendorong perlunya model pembelajaran yang adaptif, termasuk dalam pendidikan matematika. Penelitian ini bertujuan menganalisis publikasi mengenai model Flipped Classroom dalam pendidikan matematika pascapandemi (2021–Mei 2023) dan menggambarkan arah perkembangannya. Metode yang digunakan adalah systematic literature review terhadap 10 artikel, terdiri dari dua artikel terindeks Scopus dan delapan artikel dari Google Scholar yang diperoleh menggunakan aplikasi Publish or Perish. Total peserta dalam studi ini berjumlah 1.200, terdiri atas 370 siswa SD, 208 siswa SMP, 179 siswa SMA, dan 417 mahasiswa. Hasil kajian menunjukkan bahwa model Flipped Classroom berbasis digital dapat meningkatkan kemampuan komunikasi matematis, berpikir kritis, pemahaman konsep, pemecahan masalah, dan berpikir tingkat tinggi. Selain itu, model ini berpengaruh positif terhadap kepercayaan diri siswa, suasana kelas yang lebih interaktif, respons yang baik terhadap pembelajaran, serta mendukung sosialisasi di lingkungan daring. Temuan ini menunjukkan bahwa Flipped Classroom merupakan model pembelajaran yang efektif dan dapat direkomendasikan untuk pembelajaran matematika setelah pandemi.

Rethinking the Connection Between GPA and Self-Regulated Learning: A Study in Indonesian Private Universities Rizki, Lussy Midani; Kusumah, Yaya Sukjaya
Jurnal Pendidikan MIPA Vol 25, No 3 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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This study investigates the relationship between self-regulated learning (SRL) strategies and academic performance, measured by grade point average (GPA), among undergraduate students at a private university in Indonesia. Using a quantitative correlational design, data were collected from 25 students through an online survey measuring four SRL dimensions cognition, metacognition, social behavior, and motivational regulation—and verified GPA records. Regression analysis revealed a non-significant relationship, with SRL explaining only 1.2% of GPA variance (R Square = 0.012, p = 0.601). These findings suggest that SRL strategies alone are insufficient to predict academic performance and highlight the context-dependent nature of their effectiveness. External factors, such as prior academic achievement, socio-economic status, and institutional support, likely play a more dominant role in influencing GPA. The study acknowledges its limitation in not empirically examining these external factors and calls for future research to explore their mediating or moderating roles. To maximize the effectiveness of SRL, integrating it with additional support mechanisms, such as coaching, technology-enhanced tools, and culturally tailored interventions, is recommended. This study underscores the need for a holistic approach that considers diverse influences on academic success to better address the complexities of student achievement in higher education. Keywords: GPA, self-regulated learning, academic achievement, higher education. DOI: http://dx.doi.org/10.23960/jpmipa/v25i3.pp1273-1280

The Impact of 3D Geometry Assisted 6E Instructional Model to Improve 3D Geometry Thinking Skills of Junior High School Students Sudirman, Sudirman; Kusumah, Yaya Sukjaya; Priatna Martadiputra, Bambang Avip
Jurnal Pendidikan MIPA Vol 23, No 1 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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This study aims to reveal the impact of the 6E Instructional 3D geometry model (6E I3DGM) design in improving students' 3D geometric thinking skills. The approach in this study uses a mixed approach. The reason for choosing this approach is that researchers want to get a more comprehensive understanding of this research problem. In this study, the participants involved in this study were (1) junior high school mathematics teachers; (2) grade VIII junior high school students in one of the public junior high schools in Indramayu Regency. In addition, there are three methods of collecting data in this study, namely observation, documentation, tests, which were analyzed using qualitative and quantitative data analysis. Qualitative data analysis using Miles and Huberman (2014) modification consists of data collection, data reduction (data reduction), data display (data display), and conclusion drawing (verification). The statistical test used in this study used an independent t-test. The results of this study conclude that the 6E I3DGM design can improve students' 3D geometric thinking skills. This is because students (1) can activate students' prior knowledge; (2) can relate previous knowledge with prior knowledge; (3) can explore 3D geometry problems; (4) can facilitate the process of constructing new concepts of 3D geometry into students' memory; (5) able to elaborate 3D geometry knowledge acquired in other contexts; (6) can evaluate the acquired knowledge in order that the 3D geometry knowledge possessed by students is stored in cognitive structures for a long period of time.Keywords: 6E instructional 3D geometry model, 3D geometry thinking skills, junior high school students.DOI: http://dx.doi.org/10.23960/jpmipa/v23i1.pp45-56

The Impact of 3D Geometry Assisted 6E Instructional Model to Improve 3D Geometry Thinking Skills of Junior High School Students Sudirman, Sudirman; Kusumah, Yaya Sukjaya; Martadiputra, Bambang Avip Priatna
Jurnal Pendidikan MIPA Vol 23, No 1 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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

This study aims to reveal the impact of the 6E Instructional 3D geometry model (6E I3DGM) design in improving students' 3D geometric thinking skills. The approach in this study uses a mixed approach. The reason for choosing this approach is that researchers want to get a more comprehensive understanding of this research problem. In this study, the participants involved in this study were (1) junior high school mathematics teachers; (2) grade VIII junior high school students in one of the public junior high schools in Indramayu Regency. In addition, there are three methods of collecting data in this study, namely observation, documentation, tests, which were analyzed using qualitative and quantitative data analysis. Qualitative data analysis using Miles and Huberman (2014) modification consists of data collection, data reduction (data reduction), data display (data display), and conclusion drawing (verification). The statistical test used in this study used an independent t-test. The results of this study conclude that the 6E I3DGM design can improve students' 3D geometric thinking skills. This is because students (1) can activate students' prior knowledge; (2) can relate previous knowledge with prior knowledge; (3) can explore 3D geometry problems; (4) can facilitate the process of constructing new concepts of 3D geometry into students' memory; (5) able to elaborate 3D geometry knowledge acquired in other contexts; (6) can evaluate the acquired knowledge in order that the 3D geometry knowledge possessed by students is stored in cognitive structures for a long period of time.Keywords: 6E instructional 3D geometry model, 3D geometry thinking skills, junior high school students DOI: http://dx.doi.org/10.23960/jpmipa/v23i1.pp45-56

Enhancing Students' Critical Thinking in Mathematics Education: A Systematic Literature Review Nafiah, Siti; Kusumah, Yaya S; Dahlan, Jarnawi Afgani
Jurnal Pendidikan MIPA Vol 25, No 4 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Students' critical thinking abilities are one of the goals of 21st-century learning. Critical thinking abilities enable students to think in a realistic and logical way, assist in understanding and solving problems, and build effective communication skills in facing future challenges. Therefore, the aim of this Systematic Literature Review (SLR) is to identify effective methods for enhancing students' critical thinking abilities, especially in the study of mathematics education. Microsoft Excel and Publish or Perish were used to examine a total of 14 papers from 2014 to 2024 found using Google Scholar and Scopus. The results of the analysis show that teaching approaches, subject matter, and teacher attitudes are some of the methods used to improve critical thinking skills. The most popular and successful teaching method in mathematics education is problem-based learning (PBL). Additionally, research conducted between 2020 and 2022 shows a greater focus on critical thinking skills, with quantitative and qualitative research methodologies taking center stage. Teachers can use these insights to provide more imaginative and significant mathematics instruction. It is recommended that teachers develop modules and frameworks that are integrated with ICT to improve critical thinking skills, especially for teaching in the early grades. This can contribute to a more imaginative and meaningful mathematics learning process. Keywords: critical thinking, SLR, learning methods. DOI: http://dx.doi.org/10.23960/jpmipa/v25i4.pp1925-1938

Students' Learning Obstacles in Exponential: A Case Study in Indonesian Higher Education Students Suarka, Ni Komang Savitri Dharma; Kusumah, Yaya Sukjaya
Jurnal Pendidikan MIPA Vol 25, No 2 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Exponential is an essential concept in mathematics learning. Students generally understand the idea of exponentials if the base and power are natural numbers. However, when the base and the power are a negative integer, students experience difficulties, which can create learning obstacles. This research aims to identify and analyze learning obstacles that confront students at the stage of solving exponent problems, especially in the exponent form〖 -(a)〗^(-b),∀a∈Ν,b∈Z. This study uses a qualitative method with a case study type. The participants of this study were nine higher education students in Bandung. Subjects are asked to take a written test of seven questions to explore their understanding of exponents with specific characteristics. The results of the research showed that all of the learning obstacles that arise are epistemological learning obstacles, Including errors in defining exponents when the power is zero, when the power is a negative integer, when the base contains a negative sign, when the base contains a negative sign and the power is zero, and when the base contains a negative sign with a negative integer exponent. The research results obtained can be used to develop a hypothetical learning trajectory. Keywords: learning obstacle, exponential, epistemological learning obstacle, negative exponential.DOI: http://dx.doi.org/10.23960/jpmipa/v25i2.pp530-541

A Comprehensive Analysis of Augmented Reality Applications for Geometry Education: A Systematic Literature Review and Bibliometric Analysis Muhammad, Ilham; Kusumah, Yaya Sukjaya; Turmudi, Turmudi; Elmawati, Elmawati; Maharani, Swasti
QALAMUNA: Jurnal Pendidikan, Sosial, dan Agama Vol. 16 No. 1 (2024): Qalamuna - Jurnal Pendidikan, Sosial, dan Agama
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Program Pascasarjana IAI Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/qalamuna.v16i1.4850

This research represents a significant step in exploring the potential of Augmented Reality (AR) in the context of geometry learning. By utilizing the Scopus database, this research explores AR-related trends and content in geometry learning. The literature review method was used, with a bibliometric analysis approach and systematic literature review, which included four stages: identification, screening, eligibility, and inclusion, resulting in 31 final data. This is not just a description of the data but rather an attempt to present a deeper understanding of the role and potential of AR in enhancing geometry learning. In the ever-evolving world of education, a better understanding of the role of technology such as AR can open the door to more innovative and effective learning approaches. Research shows that AR technology can improve students' understanding of geometry concepts, increase learning motivation, and improve teachers' teaching skills. With AR applications, learning geometry becomes more interactive, visual, and engaging for students at various levels of education. In addition, the use of AR technology can also help create a more in-depth learning experience and motivate students to be more active in the learning process.

Metacognitive-discursive activities in Indonesian mathematics classrooms: A two-stage comparative case study Ate, Dekriati; Kusumah, Yaya Sukjaya; Cohors-Fresenborg, Elmar
Journal on Mathematics Education Vol. 16 No. 3 (2025): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.v16i3.pp1023-1042

Classroom discussions are essential for developing students’ mathematical understanding. While prior studies have examined teacher-led instruction, there remains a gap in understanding how metacognitive and discursive activities shape the quality of mathematical discussions at the whole-class level. To address this gap, this study proposes a systematic framework for analyzing public classroom discussions with a focus on metacognitive-discursive activities that support mathematical argumentation. The analysis centers on two dimensions: (1) monitoring the logical validity, correctness, and completeness of mathematical arguments, and (2) identifying how discourse quality is enhanced or obstructed by participants’ communicative strategies. This qualitative study employed a two-stage procedure: first, a fine-grained micro-level coding of classroom interactions to identify metacognitive and discursive activities, including monitoring (of terminology, methods, and argument consistency), reflection (on representational structures and methodological effectiveness), and discursive actions that either promote or hinder mutual understanding and second, a macro-level evaluation of discussion quality using a standardized rating framework. This methodological approach, applied for the first time in the Indonesian mathematics education context, enabled a more comprehensive analysis of discourse processes in whole-class discussions and helped identify phases in which strategies for enhancing the classroom discussion culture could be developed. The findings indicate that productive mathematical discussions require an environment that encourages students to articulate and critique solution strategies, justify their reasoning, and collaboratively resolve discrepancies with minimal teacher scaffolding. The study contributes to mathematics education research by providing a rigorous analytical model for examining mathematical discourse and offering evidence-based recommendations for cultivating a classroom culture that promotes deeper mathematical understanding.

Spatial Reasoning of Middle School Students in View of Mathematics Anxiety Fitriyani, Harina; Kusumah, Yaya Sukjaya; Dahlan, Jarnawi Afgani; Hendroanto, Aan
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 14, No 2 (2023): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Mathematics Dept, Math. and Science Faculty, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v14i2.42464

The low spatial reasoning ability and high mathematics anxiety of junior high school students is an interesting discussion to be studied in more depth to understand students' spatial reasoning abilities and mathematical anxiety. Therefore, this study aims to explore the spatial reasoning abilities of junior high school students in solving geometric problems in terms of students' math anxiety. The research method used is qualitative research with a case study type. Data were collected through written tests to explore spatial reasoning data, followed by task-based unstructured interviews and a Likert scale questionnaire to explore math anxiety data. Furthermore, the research data were analyzed by following the Miles and Huberman model, which consisted of data reduction (data reduction), data presentation (data display), and concluding (verification). The results showed that the average student's math anxiety was 2.294. Students' spatial reasoning abilities were dominated at a moderate level, namely 69.23%. The results also show that the students' spatial reasoning ability does not depend on the math anxiety category. The ability of spatial orientation is the ability most students master. Once the mathematical anxiety and spatial reasoning abilities of students are understood, it is intended that the teacher would take this into account while structuring geometry instruction in the classroom, which will foster the growth of students' spatial reasoning while simultaneously lowering the number of students' mathematical anxiety.Rendahnya kemampuan penalaran spasial dan tingginya kecemasan matematika siswa SMP menjadi bahasan menarik untuk dikaji lebih mendalam supaya diperoleh pemahaman menyeluruh tentang kemampuan penalaran spasial dan kecemasan matematika siswa. Oleh karena itu penelitian ini bertujuan untuk mengeksplorasi kemampuan penalaran spasial siswa SMP dalam memecahkan masalah geometri ditinjau dari kecemasan matematika siswa. Adapun metode penelitian yang dilakukan adalah penelitian kualitatif dengan jenis studi kasus. Data dikumpulkan melalui tes tertulis untuk menggali data penalaran spasial dilanjutkan dengan wawancara tidak terstruktur berbasis tugas, dan angket skala likert untuk menggali data kecemasan matematika. Selanjutnya data penelitian dianalisis dengan mengikuti model Miles dan Huberman yang terdiri atas: reduksi data (data reduction), penyajian data (data display), dan penarikan kesimpulan (verification). Hasil penelitian menunjukkan bahwa rata-rata kecemasan matematika siswa yaitu 2,294. Kemampuan penalaran spasial siswa didominasi berada pada level sedang yakni 69,23%. Hasil penelitian juga menunjukkan bahwa kemampuan penalaran spasial siswa tidak bergantung pada kategori kecemasan matematika. Kemampuan orientasi spasial menjadi kemampuan yang paling banyak dikuasai siswa. Setelah kecemasan matematika dan kemampuan penalaran spasial siswa diketahui maka diharapkan dapat menjadi bahan pertimbangan guru dalam mendesain pembelajaran geometri di kelas yang dapat merangsang perkembangan penalaran spasial siswa, pun juga dapat mengurangi tingkat kecemasan matematika siswa.

Co-Authors 'Ulya, Zahratul Aan Hasanah Aan Hendroanto Adjis, Vidia Amalia Ahmad Zamsuri, Ahmad Al Jupri, Al Jupri Andini, Meri Ani Minarni Anik Yuliani Aridanthy, Vanya Ariyanti Jalal Astri Wahyuni Ate, Dekriati Atma Murni Avip, Bambang Bainuddin Yani bambang avip Priatna Bambang Avip Priatna Martadiputra Bambang Avip Priatna Martadiputra cakrawala Bana Goerbana Kartasamita Bonita Hirza Candra Ditasona Cohors-Fresenborg, Elmar Dadan Dasari Dadang Juandi Dahlan, Jarnawi Ahmad Dahlia Fisher Darhim Darhim Dede Sulaeman, Dede Deswita, Ria Deswita, Ria Dewi, Nuriana Rahmani Didi Suryadi Dina Mayadiana Suwarma Dini Kinati Fardah Dwicahyo, Larasati Adira E. Elvis Napitupulu, E. Elvis Edy Surya Elah Nurlaelah Elmawati, Elmawati Elsayed, Ebrahim E. Endang Cahya Mulyaning A. Endang Wahyuningrum Epran, Epran Erma Monariska Ernawati Fadhil Zil Ikram Farida Nurhasanah Fatimah, Siti Finola Marta Putri Fitriyani, Harina Florida Moza, Florida Gerry Filiestianto Gunadi, Farid Haq. MY, Annisa Husnul Harina Fitriyani Hendriyanto, Agus Hepsi Nindiasari Heri Sutarno Idrus Alhaddad Ilham Muhammad Isra Nurmai Yenti Jarnawi Afgani Dahlan Jozua Sabandar Jozua Sabandar Julianti, Dola Kurnia Putri Sepdikasari Dirgantoro Kurniati Kurniati Kusnandi Kusnandi Kusnandi, Kusnandi Kyaruzi, Florence Luhur Bayuaji, Luhur Lussy Midani Rizki Maknun, Churun L Maknun, Churun Lu'lu'il Margaretha Madha Melissa Marlina Martadiputra, Bambang Aviv Priatna Melati, Catur Yustika Muhaimin, Lukman Hakim Mulyono, Budi Nafiah, Siti Nanang Priatna Napitupulu, E.Elvis Nia Kania Nita Delima Nopitasari, Dian NurAfni NurAfni Nurwita, Faizah Pakaya, Yusril Mahendra Panjaitan, M. Azhari Pieter Zakarias Tupamahu PRASETYAWAN, ENGGAR Prida N. L. Taneo Rahayu, Diar Veni Rahmah Johar Ratni Purwasih, Ratni Reviandari Widyatiningtyas, Reviandari Rizky Rosjanuardi Rohati Rohati Sabandar, Jozua Said Husain, Sharifah Kartini Sani Sahara Saputri, Veni Sardin Sari Herlina Sari, Fitri Aida Sartika, Rahma Adinda sholikhakh, Rizqi Amaliyakh Silitonga, R. H. Yanti Siswanto, Rizki Dwi Stevi Natalia Suarka, Ni Komang Savitri Dharma Sudirman Sudirman Sufyani Prabawanto, Sufyani Sugiman Sugiman Sulistiawati Sulistiawati Swasti Maharani Tatang Herman, Tatang Teapon, Nurhuda 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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