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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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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

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

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.

Evaluation of industrial work practice program in Vocational High School 1 Rejotangan Rachmawati, Andini Dwi; Kusumah, Yaya Sukjaya
Jurnal Pendidikan Vokasi Vol. 13 No. 1 (2023): February
Publisher : ADGVI & Graduate School of Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpv.v13i1.46917

This study aims to evaluate implementing the Industrial Work Practice (Prakerin) program at the Vocational High School (VHS) of 1 Rejotangan. This type of research is evaluative with a descriptive qualitative method using the CIPP model. The population of this study was 15 students involved, five work of world instructors, 21 teacher councils, and the headmaster of VHS of 1 Rejotangan. Data collection techniques use interviews and observations. Interviews are conducted openly and behind closed doors. The interview was conducted with the headmaster of VHS of 1 Rejotangan. The observations made by the researchers aimed to capture data on pre-employment activities, sincerity, and cooperation of participants and instructors during the activity. The results of this study are (1) synchronization of the joint curriculum to the world of work at the evaluation stage of the context of the VKS of 1 Rejotangan industrial practice program. At this stage, (1) the signing of an MOU between the world of work schools, a student readiness plan (competency mapping), and a placement plan (world of work Placement Mapping); (2) input evaluation obtained information that a cooperative organization was formed. The cooperative organization between schools and the business world and industry in the industrial practice program has two aspects: departmentalization and division of labor. The division of labor comprises principals and teachers from the business/industrial world. Meanwhile, departmentalization consists of mapping students. Place students in existing competencies and an appropriate world of work; (3) process evaluation, a collaboration between schools and the world of work for student development, is flexible and consistent with each school's policies; (4) product evaluation. The internship program has many benefits for schools and the world of work.

Constructing and providing content validity evidence through the Aiken's V index based on the experts' judgments of the instrument to measure mathematical problem-solving skills Kania, Nia; Kusumah, Yaya S.; Dahlan, Jarnawi Afgani; Nurlaelah, Elah; Gí¼rbí¼z, Ferit; Bonyah, Ebenezer
REID (Research and Evaluation in Education) Vol. 10 No. 1 (2024)
Publisher : Graduate School of Universitas Negeri Yogyakarta & Himpunan Evaluasi Pendidikan Indonesia (HEPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/reid.v10i1.71032

Test content-based proof of validity is a type of evidence that supports the validity of a measuring instrument. This research aims to develop a mathematical problem-solving assessment instrument utilizing five experts. This study is classified as developmental research and follows a research design that includes two separate stages: the preliminary design stage and the prototype stage. However, its application is restricted to Prototype 1 and Prototype 2, specifically for expert evaluation. This instrument was designed explicitly for grade VIII students studying mathematics, covering all the topics from the odd semesters. The analysis progressed through three distinct stages "” curriculum analysis, content analysis, and context analysis "” each contributing to a comprehensive understanding of instructional resources. The study sought to narrow the gap between theoretical knowledge and practical application in mathematics education by incorporating real-world context. Surveys have revealed difficulties in answering mathematical problems, highlighting the need to address gaps in learning to improve competency. The careful and thorough construction of test instruments, considering factors such as validity, established the foundation for creating accurate assessment tools. The content validity assessment by the expert panel, with scores ranging from 0.817 to 0.884 based on the V-Aiken category, confirms that the instrument is vital in assessing students' mathematical problem -solving skills, and the implementation of this study yielded many valuable insights for educators and academics. This study helps improve mathematics education resources and evaluations to promote mathematical thinking.

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.

Analysis of Students' Proficiency in Mathematical Communication Through the View of Self-Regulated Learning Sari, Fitri Aida; Kusumah, Yaya Sukjaya; Juandi, Dadang
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.v14i2.45996

Changes in the education implementation system during the Covid-19 pandemic force students to adapt quickly. This adaptation occurs because online learning limits teachers ' ability to monitor the overall learning carried out by students. Therefore, in the implementation, students must have Self-Regulated Learning to manage their learning activities independently and analyze their learning needs. In addition, Self-Regulated Learning is also able to provide support for improving various abilities, for example, mathematical communication. This study aimed to determine whether Self-Regulated Learning affects students’ mathematical communication skills. The research method used is correlational with a sample of 31 students in grade IX of a junior high school in Serang City. The results of this study indicate that Self-Regulated Learning affects students' mathematical communication skills, with a coefficient of determination equal to 21%. This research can inform educators that Self-Regulated Learning influences students' mathematical communication abilities, so educators must design learning to help improve students' Self-Regulated Learning.Perubahan sistem pelaksanaan pendidikan pada kondisi pandemi Covid-19 memaksa siswa untuk beradaptasi secara cepat. Adaptasi tersebut terjadi karena pembelajaran secara online memberikan batasan bagi guru untuk memantau keseluruhan pembelajaran yang dilakukan oleh siswa. Oleh karena itu, dalam pelaksanaan pembelajaran secara online siswa harus memiliki Self-Regulated Learning agar mampu mengatur kegiatan belajarnya secara mandiri dan mampu menganalisis kebutuhan belajarnya. Selain memberi dukungan yang besar terhadap pelaksanaan pembelajaran secara online, Self-Regulated Learning juga mampu memberikan dukungan terhadap peningkatan berbagai kemampuan, salah satunya adalah komunikasi matematis. Penelitian ini bertujuan untuk mengetahui apakah terdapat pengaruh Self-Regulated Learning terhadap kemampuan komunikasi matematis siswa. Metode korelasional digunakan dengan sampel penelitian sebanyak 31 murid kelas IX di salah satu SMP di Kota Serang. Hasil penelitian ini menunjukkan Self-Regulated Learning berpengaruh terhadap kemampuan komunikasi matematis siswa dengan koefisien determinasi yaitu sebesar 21%. Penelitian ini dapat memberikan informasi kepada pendidik bahwa Self-Regulated Learning berpengaruh terhadap kemampuan komunikasi matematis siswa, sehingga pendidik harus merancang pembelajaran yang dapat membantu meningkatkan Self-Regulated Learning siswa.

Pengaruh Model Pembelajaran React Terhadap Kemampuan Berpikir Analisis Dan Minat Belajar Ditinjau Dari Level IQ Sulaeman, Dede; Kusumah, Yaya S.; Wahyuningrum, Endang
SJME (Supremum Journal of Mathematics Education) Vol 7 No 2 (2023): Supremum Journal of Mahematics Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v7i2.8704

This study uses a quantitative approach with quasi-experimental research. This study aims to 1) examine the effect of applying the REACT learning model on students' analytical thinking skills in terms of Intelligence Quotient (IQ) in class XI IPA. 2) Assess the effect of the application of the REACT learning model on students' learning interest in terms of IQ in class XI IPA. 3) Assessing the effect of the interaction of learning models and Intelligence Quotient (IQ) on students' analytical thinking skills in class XI IPA. 4) Assessing the effect of the interaction of learning models and Intelligence Quotient (IQ) on students' learning interest in class XI IPA. The population in this study were all students of class XI IPA SMA Islam Dian Didaktika Cinere Depok, samples were taken from two classes XI IPA with Cluster Random Sampling, while the design used was treatment by level design. The results show that 1) There is an effect of the application of the learning model on students' analytical abilities 2) There is no effect of the application of the REACT learning model on students' learning interest between the experimental and control groups. 3) There is an interaction between the REACT and Intelligence Quotient (IQ) learning models on students' analytical thinking skills. 4) There is no interaction between learning models and Intelligence Quotient (IQ) on students' learning interest.

Implementasi Media Android Kepada Calon Guru, Guru SMA dan MA di Kabupaten Indramayu Gunadi, Farid; Dadang Juandi; Rizki Dwi Siswanto; Sholikhakh, Rizqi Amaliyakh; Saputri, Veni; Kusumah, Yaya S.; Dasari, Dadan
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.19408

Background: Based on observations and interviews with teachers and grade XII students, it was found that students still have difficulty understanding mathematics. This is due to the lack of creativity of teachers in creating technology-based learning media. Method: This community service activity aims to provide solutions through simulations and focus group discussions (FGD) on the use of Android-based learning media. FGD participants consisted of 11 teachers and 3 prospective teachers from high schools and Islamic high schools in Indramayu. The activity was carried out through direct simulations and discussions, with data collection using questionnaires that were analyzed through the validity test of the Aiken and Atlas-ti indexes. Results: The results showed that Android media met the aspects of content quality, learning, and technical aspects with the category of "feasible" (average score of 3.454). Conclusion: The application was declared feasible for use in learning, although it still needs further development according to participant input.

ULTRA: A Digital Gamification Approach to Boosting Mathematical Creative Thinking and Self-Regulated Learning Nopitasari, Dian; Kusumah, Yaya Sukjaya; Juandi, Dadang; Priatna, Bambang Avip
Jurnal Pendidikan MIPA Vol 26, No 4 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i4.pp2720-2741

The Mathematics Education Game is a gamification-based teaching material specifically designed to develop mathematical creative thinking skills and self-regulated learningin high school students. This game adopts a Snakes and Ladders format, consisting of three learning modules covering core trigonometry: basic concepts, quadrants, special angles, trigonometric equations, trigonometric identities, double-angle identities, sums and differences of angles, and multiplication of trigonometric functions. The game developed in this study, Attractive Trigonometric Snakes and Ladders (ULTRA), aims to serve as an engaging digital learning resource for students in grades XI and XII. The purpose of this study is to examine the improvement in creative thinking skills and self-regulated learning of students who use ULTRA. The research method uses the ADDIE model and is evaluated through three research instruments: (1) a mathematical creative thinking test containing four essay questions to measure fluency, flexibility, originality, and elaboration; (2) a 24-item self-regulated learning questionnaire that assesses goal setting, monitoring, strategy use, and reflection; and (3) a 15-item student response questionnaire to assess usability and engagement. Effectiveness was analyzed using normalized gain, while validity and practicality were reviewed through expert assessment and descriptive data. The research subjects were 496 students from 16 classes, comprising 247 in the experimental class and 249 in the control class. This study concluded that ULTRA is valid, practical, and has potential as a digital medium for mathematics learning. Effectiveness testing conducted in four schools showed a moderate increase in N-Gain in mathematical creative thinking skills, as well as positive behavioral indicators of learning independence, indicating that ULTRA strengthens students' higher-order thinking skills and independence. Overall, the findings indicate that the ULTRA game has the potential to improve mathematical creative thinking and self-regulated learningwhile providing an engaging digital learning experience for students. Keywords: education game, creative thinking, self-regulated learning.

Co-Authors 'Ulya, Zahratul Aan Hasanah Aan Hendroanto Adjis, Vidia Amalia Ahmad Zamsuri, Ahmad 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 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 Dede Sulaeman, Dede Deswita, Ria Deswita, Ria Dewi, Nuriana Rahmani Didi Suryadi Dina Mayadiana Suwarma 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. Endang Wahyuningrum Epran, Epran Erma Monariska Ernawati Fadhil Zil Ikram Farida Nurhasanah Fatimah, Siti Finola Marta Putri Fitriyani, Harina Florida Moza, Florida Gerry Filiestianto Gí¼rbí¼z, Ferit 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 Kartika Yulianti Kurnia Putri Sepdikasari Dirgantoro Kurniasi, Eka Rachma Kurniati Kurniati Kusaka, Satoshi 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 Muhaimin, Lukman Hakim Mulyono, Budi N. Nurjanah 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 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 Herlina Sari, Fitri Aida Sartika, Rahma Adinda sholikhakh, Rizqi Amaliyakh 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 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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