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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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Interaction between Students' Learning and Early Mathematical Skills to Increase Mathematical Critical Thinking Skills Yumiati, Yumiati; Kusumah, Yaya
Al-Jabar: Jurnal Pendidikan Matematika Vol 10 No 1 (2019): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v10i1.3712

The aim of this study is to determine the interaction between learning factors (CORE and conventional) and the initial mathematical skills factor (KAM) to increase mathematical critical thinking skills (KBKM) of students. The method used in this study was quasi-experimental with the non-equivalent group pretest-post design. The data analysis used was two-way ANAVA test. The results of the study are (1) There is no interaction between learning factors with KAM factors (2) the improvement students’ mathematical critical thinking skills in the CORE (connecting, organizing, reflecting, extending). learning group is higher than the conventional learning group for each KAM group (3) In both learning groups, the improvement of the students’ mathematical critical thinking skills in the upper KAM level is higher than the middle and lower KAM level and the improvement in the middle KAM level is higher than the lower KAM level.

Critical Thinking: How is it Developed with the Experiential Learning Model in Junior High School Students? Yuliani, Anik; Kusumah, Yaya Sukjaya; Dahlan, Jarnawi Afghani
Al-Jabar: Jurnal Pendidikan Matematika Vol 12 No 1 (2021): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v12i1.8857

This research aims to determine whether the achievement and improvement of mathematical critical thinking abilities of junior high school students who get the experiential learning model is better than those who get conventional learning and to find out which indicators of critical thinking abilities that junior high school students find difficult. This research is a quantitative research with a quasi-experimental research type. The design in this research was the randomized pretest-posttest control group design. The instrument used in this research is a set of tests to describe the mathematical critical thinking ability with a system of two-variable linear equations. The analysis used in this research using the t test, with a one-party hypothesis. Post-test data is used to see the achievement of mathematical critical thinking abilities and N-gain data to see the improvement. The conclusion in this research is the achievement and improvement of mathematical critical thinking abilities of students who receive experiential learning is better than the mathematical critical thinking abilities of students who receive conventional learning. There is aspect that students find difficult, namely the advanced clarification aspect.

The Achievement of Middle School Students’ Mathematical Problem Solving Abilities through Project-Based Learning Models Fisher, Dahlia; Kusumah, Yaya Sukjaya; Dahlan, Jarnawi Afgani
Al-Jabar: Jurnal Pendidikan Matematika Vol 12 No 1 (2021): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v12i1.8858

This research aims to determine the use of project-based learning (PjBL) in the achievement of students' mathematical problem-solving abilities. The variables in this research were PjBL and mathematical problem-solving abilities. The instrument in this research was a description test of mathematical problem-solving abilities, which was analyzed by testing the hypothesis using the Mann Whitney U test. The results showed that the average value of students learning using PjBL was higher than students learning using conventional models. The results of the Mann Whitney test show that learning using PjBL is effective in improving students' mathematical problem-solving abilities.

Exploring students’ mathematical computational thinking ability in solving pythagorean theorem problems Nurwita, Faizah; Kusumah, Yaya Sukjaya; Priatna, Nanang
Al-Jabar: Jurnal Pendidikan Matematika Vol 13 No 2 (2022): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v13i2.12496

This study explores students' mathematical computational thinking ability in solving the Pythagorean Theorem problem. This research method used a qualitative approach with a phenomenological design. The subjects involved in this study were 12 junior high school students. Six students in grade 7 had not studied the Pythagorean Theorem, and six students in grade 8 were studying the Pythagorean Theorem. This study's results indicate several problems with students' mathematical computational thinking skills in mathematics learning. The first problem is seen from the aspect of abstraction. Students are given problems with the help of digital-based teaching aids. Then the researcher provides procedures containing questions so students can digest the information and follow their intuition to find a solution strategy. Still, students have not decided what information should be stored or ignored. The second problem is seen from the aspect of decomposition. Students have not been able to decompose complex problems into simpler and more manageable ones. Student responses are also still not according to the researchers' predictions. However, with the scaffolding technique, researchers can direct students' intuition or thought processes to focus more on the problem being asked. The third problem is seen from the aspect of generalization. Students have not been able to generalize the problem and have not been able to conclude from the steps that have been taken. These three problems indicate that students cannot recognize and identify patterns well, thereby reducing the efficiency of the mathematical problem-solving process.

Mathematical framework for accurate prayer times: Insights from the bencet tradition Muhaimin, Lukman Hakim; Kusumah, Yaya S.; Juandi, Dadang; Hendriyanto, Agus; Sahara, Sani
Indonesian Journal of Science and Mathematics Education Vol. 6 No. 3 (2023): Indonesian Journal of Science and Mathematics Education
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijsme.v6i3.19790

Mathematics is fundamental in structuring religious practices, especially in determining prayer times. This study explores the mathematical concepts embedded in the traditional bencet tool used by communities to calculate prayer times accurately. Using a qualitative ethnographic approach, the research examines both the use and crafting of bencet through observations, interviews, and documentation. Based on the Miles and Huberman model, data analysis reveals that the bencet tongkat unconsciously incorporates mathematical concepts such as parallel lines, measurements, and planar surfaces. Similarly, the bencet garis reflects understanding parallel and perpendicular lines, circular constructions for 90° angles, and precise measurements. The findings underscore the deep interconnection between mathematical principles and cultural traditions. This study concludes that the bencet tool represents an untapped resource for ethnomathematics research. The implications highlight the potential of ethnomathematics as an innovative approach to mathematics education, integrating cultural heritage into learning.

Global Trend of Numeracy Research: A Bibliometric Analysis Using Scopus Database Saputri, Veni; Kusumah, Yaya Sukjaya; Turmudi, T; Jupri, Al
Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Volume 13 Issue 2 August 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/euler.v13i2.33003

The study of numeracy has grown rapidly in the last decade, especially after the implementation of the Minimum Competency Assessment (MCA) in Indonesia since 2021. This research aims to map the development of numeracy research globally through bibliometric analysis, with a computational mapping approach using Bibliometrix in RStudio and VOSviewer. Article data was taken from the Scopus database published from 2014 to 2023. Article titles, keywords and abstracts guided the search process with reference to the keyword ‘numeracy’. A total of 811 documents were identified, of which 699 were cited. The analysis showed an increasing publication trend, with a predominance of contributions from specific countries and institutions, and a thematic focus on academic achievement, cognitive ability and early literacy. Keyword visualisations also reveal interrelationships between topics and show that the integration of technology in numeracy learning is still relatively limited. The findings provide a comprehensive overview of the structure and direction of numeracy research and open up opportunities for further exploration in digital and interdisciplinary learning contexts.

Mathematical Literacy of Prospective Teachers: A Systematic Review of Factors, Readiness, and Teacher Education Preparation Dirgantoro, Kurnia Putri Sepdikasari; Kusumah, Yaya Sukjaya; Jupri, Al; Melissa, Margaretha Madha
Jurnal Pendidikan MIPA Vol 26, No 3 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i3.pp1355-1376

Mathematical literacy is a crucial competency for 21st-century teachers to foster critical thinking and problem-solving skills in various educational contexts. However, several pieces of evidence suggest that many prospective teachers struggle to develop mathematical literacy, which may hinder the effectiveness of mathematics learning. This study aims to provide a comprehensive overview of the mathematical literacy of prospective teachers through a systematic literature review of previous research. The study used the PRISMA protocol by searching articles from five reputable databases (ERIC, ProQuest, Taylor & Francis, Emerald Insight, and Scopus) using predefined inclusion and exclusion criteria. Of the initial search results of 8659 articles, only 13 articles were eligible for further review after the screening and duplication removal process. The analysis was focused on six research questions which included: (1) the geographical distribution of the research, (2) the academic background of the research subject, (3) the research topic, (4) factors that affect mathematical literacy, (5) the readiness of prospective teachers, and (6) the form of debriefing by the teacher education program. The results showed that the mathematical literacy of prospective teachers was influenced by both internal factors, such as conceptual comprehension, self-efficacy, and anxiety, as well as external factors, including pedagogical training and sociocultural contexts. However, most teacher education programs have not optimally emphasized the development of contextual and applicative mathematical literacy. This study highlights the importance of strengthening the teacher education curriculum through a contextual, activity-based, and culturally responsive approach, enabling prospective teachers to develop and effectively implement mathematical literacy in diverse learning contexts. Keywords: mathematical literacy, prospective teacher, systematic review, teacher education, pedagogical preparation.

E-Module Design Based on STEM and RME for Student Numeracy Development in Senior High Schools: Insights from a Needs Analysis Saputri, Veni; Kusumah, Yaya Sukjaya; Turmudi, Turmudi; Al Jupri, Al Jupri
Proceedings of International Conference on Science, Education, and Technology Vol. 11 (2025)
Publisher : Universitas Negeri Semarang

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

This study aims to analyse the needs of students and teachers in developing e-modules for mathematics learning based on the STEM (Science, Technology, Engineering, and Mathematics) and RME (Realistic Mathematics Education) approaches. This study used a descriptive approach with 203 students and 6 mathematics teachers from several high schools in Bekasi City as subjects. Data were collected through four types of instruments, namely numeracy tests, student needs questionnaires, teacher needs questionnaires, and semi-structured interviews. Data analysis was conducted using the Miles & Huberman model, which includes the stages of data collection, data reduction, data presentation, and conclusion drawing. The results of the analysis showed that the students had difficulties in understanding the material, performing calculation operations, and solving mathematical problems. The students also show low self-efficacy and require contextual, interesting, and interactive teaching materials. The students' preferences for the appearance of the e-module include the use of colours that are not excessive, consistent fonts, simple navigation, and communicative language. On the other hand, teachers show a limited understanding of the STEM-RME approach and have not fully integrated the approach into learning. The teachers express the need for learning strategies and media that can improve students' numeracy and self-efficacy, and emphasise the importance of training in the use of digital media. These findings provide an important basis for designing e-modules that meet the requirements and characteristics of users, namely students and teachers, to support the effectiveness of mathematics learning.

Pendampingan Guru Sekolah Menengah dalam Penerapan ICT untuk Asesmen Pembelajaran Dahlan, Jarnawi Afgani; Kusumah, Yaya Sukjaya; Monariska, Erma; Jalal, Ariyanti; Maknun, Churun Lu'lu'il; Ernawati; Ikram, Fadhil Zil; Panjaitan, M. Azhari; Tupamahu, Pieter Z.; Silitonga, R. H. Yanti
Sipakaraya : Jurnal Pengabdian Masyarakat Vol 4 No 1 (2025): Sipakaraya : Jurnal Pengabdian Masyarakat
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/sipakaraya.v4i1.5428

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengatasi permasalahan rendahnya pemanfaatan teknologi informasi dan komunikasi (ICT), khususnya dalam kegiatan evaluasi dan asesmen pembelajaran oleh guru di sekolah mitra. Permasalahan ini dapat ditinjau dari dua aspek utama, yaitu keterbatasan pengetahuan dan keterampilan guru dalam menggunakan platform digital untuk evaluasi dan asesmen, serta belum dikenalnya potensi kecerdasan buatan (AI) dalam menunjang penilaian pembelajaran yang efektif dan efisien. Melalui kegiatan pengabdian berupa pendampingan atau pelatihan ini, diharapkan para guru di sekolah mitra tidak hanya memperoleh pemahaman konseptual tentang pentingnya integrasi teknologi dalam evaluasi dan asesmen pembelajaran, tetapi juga memiliki keterampilan praktis untuk menerapkannya secara langsung dalam konteks kelas mereka masing-masing. Kegiatan pengabdian dilaksanakan secara hybrid yang berpusat di SMK TIK Al-Islam Purwakarta. Kegiatan dilaksanakan pada hari Sabtu, 23 Agustus 2025 dengan 27 guru yang mengikuti kegiatan. Adapun guru-guru yang mengikuti kegiatan ini berasal dari tiga sekolah yaitu SMA Al Jundiyah, SMA Dzakiyun 2, dan SMK TIK Al Islam. Hasil pelaksanaan serta evaluasi terhadap kegiatan pengabdian masyarakat yang telah dilaksanakan menunjukkan bahwa indikator keberhasilan kegiatan pengabdian, yaitu materi, narasumber, pelaksanaan kegiata, serta dampak manfaat, sudah terpenuhi sehingga kegiatan pendampingan atau pelatihan terkait pemanfaatan ICT dalam asesmen pembelajaran dapat dikatakan sukses dan berhasil. Kegiatan pendampingan atau pelatihan berhasil dalam menambah wawasan dan pengetahuan serta keterampilan terkait ICT dalam Pendidikan, utamanya mengenai pemanfaatannya dalam asesmen pembelajaran. Selain itu, para responden juga memberikan komentar yang positif terhadap pelaksanaan kegiatan dan berharap kegiatannya dapat dilaksanakan secara berkala.

Students’ and Teacher’s Difficulties in Dealing with Real-context Problem: a Case Study Fardah, Dini Kinati; Kusumah, Yaya Sukjaya
Journal of Honai Math Vol. 8 No. 2 (2025): Journal of Honai Math
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jhm.v8i2.828

One of the goals of students studying mathematics is so that students have the ability to solve everyday problems. This ability leads to what is known as mathematical literacy. This article aims to describe the difficulties of teachers in activating mathematical literacy in the classroom and the difficulties of students in solving real-world context problems. This is a case study in a private school in Bandung, Indonesia. Eighteen students and their mathematics teachers were selected as subjects in this study. The results showed that students had difficulty understanding problems, especially non-routine problems that related to real-world contexts, even though they claimed to be familiar with the context given. In addition, students also had difficulty with the prerequisite material to solve the contextual problems given. Facing problems that they were unfamiliar with caused their confidence in solving problems to decrease when compared to their initial level of confidence. Meanwhile, for teachers, students' low reading interest, low reading comprehension, and low reasoning ability were problems for them. Designing a series of activities brought from real-world contexts in open-ended problem types that require reasoning and higher-order thinking skills can be a tool for students to develop mathematical literacy and can help teachers to implement it in their classrooms.

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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