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All Journal Statistika AKSIOMA: Jurnal Program Studi Pendidikan Matematika International Journal of Elementary Education JISAE (Journal of Indonesian Student Assesment and Evaluation) Equals : Jurnal Ilmiah Pendidikan Matematika Jurnal Riset Pembelajaran Matematika Sekolah Mosharafa: Jurnal Pendidikan Matematika Griya Journal of Mathematics Education and Application JagoMIPA: Jurnal Pendidikan Matematika dan IPA SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA COMMUNITY : Jurnal Pengabdian Kepada Masyarakat Unnes Journal of Mathematics Education Jurnal Riset Pendidikan Matematika Jakarta Journal of Mathematics Instruction, Social Research and Opinion Euclid Journal of Medives: Journal of Mathematics Education IKIP Veteran Semarang Jurnal Ilmiah Multidisiplin Ilmu Edumaspul: Jurnal Pendidikan Mathema: Jurnal Pendidikan Matematika
Pinta Deniyanti Sampoerno
Universitas Negeri Jakarta
Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Eksplorasi Kesalahan Siswa pada Materi Aljabar di SMP: Systematic Literature Review Vivied Eka Pratiwi; Sampoerno, Pinta Deniyanti; Aziz, Tian Abdul
Griya Journal of Mathematics Education and Application Vol. 5 No. 4 (2025): Desember 2025
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v5i4.975

Abstract

An educator must conduct error analysis to determine the extent to which students understand the lesson. Furthermore, student error analysis can also be used as evaluation material and as a consideration in subsequent learning. The purpose of this study was to review literature related to error analysis in junior high school algebra material. This research is a Systematic Literature Review. Data collection was conducted by reviewing articles that have the research topic of error analysis theory in junior high school algebra problems. Data collection came from journals indexed by Sinta for the past 5 years. The obtained articles were 16 articles that met the criteria. Based on the search results, it was found that the analysis theory frequently used to conduct error analysis in algebra material is the costalan theory with three indicators: conceptual errors, procedural errors, and technical errors. The types of errors that appear range from misinterpreting algebraic elements to misapplying correct concepts. Therefore, a possible solution is to create learning activities that emphasize active student involvement to help students understand the concepts of algebra
Bibliometric Analysis of Research on Mathematical Problem-Solving Ability Using VOSviewer and Google Scholar (2010–2025) Laila Rahmi S; Pinta Deniyanti Sampoerno; Flavia Aurelia Hidajat
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 8 No. 1 (2026): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v8i1.1223

Abstract

Mathematical problem-solving skills are a key competency of the 21st century and are an important focus in mathematics education. This study aims to map the development of research on mathematical problem-solving skills in the period 2010–2025 using a bibliometric approach based on Google Scholar. Data were collected through Harzing's Publish or Perish (PoP) using keywords related to mathematical problem solving/problem solving ability and exported in .CSV and .RIS formats. The metadata were then cleaned and normalized using Microsoft Excel, then analyzed using VOSviewer to produce network, overlay, and density visualizations. The results of the analysis show an increasing publication trend since 2015, peaking in 2021–2022, then declining in 2023–2025, which is thought to be influenced by the limited coverage of current data. Co-occurrence mapping formed several main clusters: (1) learning models and problem-solving development, (2) skills/abilities as learning outcomes, (3) educational context and learning influences, (4) problem-solving processes and strategies as well as affective factors (self-efficacy), and (5) assessment and ability indicators. The overlay findings indicate that current topics for 2021–2025 are shifting toward affective factors and self-regulation, such as self-efficacy, mathematical resilience, independence, and the study of strategies and processes. Overall, research is still dominated by cognitive and pedagogical factors, while integrative exploration of affective aspects and the development of comprehensive assessment instruments remain limited. This mapping provides a basis for formulating directions for further research and strengthening the design of learning and assessment of mathematical problem-solving skills.
Pengembangan Buku Ajar Berbasis Realistic Mathematics Education pada Pokok Bahasan Teorema Pythagoras untuk Siswa SMP Tika Kurnia Amaliyah; Pinta Deniyanti Sampoerno; Dwi Antari Wijayanti
JURNAL RISET PEMBELAJARAN MATEMATIKA SEKOLAH Vol. 10 No. 1 (2026): Jurnal Riset Pembelajaran Matematika Sekolah
Publisher : Program Studi Pendidikan Matematika FMIPA Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jrpms.101.10

Abstract

Penelitian ini dilakukan untuk mengembangkan bahan ajar berupa buku ajar berbasis RME pada pokok bahasan teorema Pythagoras untuk siswa kelas VIII SMP. Metode penelitian yang digunakan adalah metode penelitian pengembangan ADDIE (Analysis, Design, Development, Implementation, dan Evaluation). Subjek uji coba adalah siswa kelas IX SMPN 1 Tarumajaya. Berdasarkan hasil analisis kebutuhan pada tahap analysis, pokok bahasan yang dipilih siswa adalah teorema Pythagoras. Instrumen penilaian yang digunakan berupa instrumen validasi dan angket yang diberikan kepada ahli materi, ahli bahan ajar, guru matematika, dan siswa. Pengujian dilakukan melalui tahap validasi serta uji coba kelompok terbatas dan uji coba lapangan. Pada tahap validasi, produk memperoleh skor dari ahli materi, ahli bahan ajar, dan guru matematika masing-masing sebesar 3,69; 3,82; dan 3,97 yang ketiganya masuk pada kategori sangat layak. Pada uji coba kelompok terbatas, diperoleh peniaian dari siswa dan guru masing-masing sebesar 3,65 dan 3,84 yang keduanya termasuk kategori sangat layak. Pada uji coba lapangan, penilaian dari siswa dan guru masing-masing sebesar 3,68 dan 3,84 yang keduanya juga termasuk kategori sangat layak. Berdasarkan hasil tersebut, buku ajar berbasis RME pada pokok bahasan teorema Pythagoras untuk siswa kelas VIII SMP ini dinyatakan sangat layak untuk digunakan dalam proses pembelajaran matematika.
Efektivitas Desain Didaktis Materi Lingkaran Berbasis Realistic Mathematics Education terhadap Kemampuan Pemahaman Konsep Matematis Ellis Salsabila; Mimi Nur Hajizah; Pinta Deniyanti Sampoerno
Jurnal Riset Pendidikan Matematika Jakarta Vol. 7 No. 2 (2025): Jurnal Riset Pendidikan Matematika Jakarta Volume 7, Nomor 2, Tahun 2025
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jrpmj.v7i2.61476

Abstract

This study aims to examine the effectiveness of a didactical design-based teaching material grounded in Realistic Mathematics Education (RME) on the topic of circles in improving students’ conceptual understanding of mathematics. The study employed a quasi-experimental approach with a nonequivalent control group design. The participants consisted of 60 eighth-grade students from a junior high school, divided into the experimental group using RME-based learning modules and the control group receiving conventional, teacher-centered instruction. The main instrument was a conceptual understanding test developed based on six indicators: restating concepts, providing examples and non-examples, classifying, representing, explaining relationships among concepts, and applying procedures meaningfully. Results revealed that the experimental group achieved a higher mean N-gain (0.74, high category) compared to the control group (0.30, low–moderate category). The t-test showed a significant difference (p < 0.001) with a large effect size (Cohen’s d = 1.47). Analysis by indicator indicated significant improvements across all aspects, particularly in explaining conceptual relationships and mathematical representation. These findings confirm that RME-based didactical design materials effectively enhance students’ conceptual understanding of circles by facilitating meaningful rediscovery through real-world contexts and progressive mathematical modeling. Practically, the study suggests that mathematics teachers can adopt RME designs as an alternative instructional approach to promote deeper, contextual, and communicative learning in geometry.
Pengembangan dan Standarisasi Instrumen Berpikir Kritis Matematis dan Self-Confidence Siswa Gharitza Zahira Shofa; Flavia Aurelia Hidajat; Mimi Nur Hajizah; Pinta Deniyanti Sampoerno
JagoMIPA: Jurnal Pendidikan Matematika dan IPA Vol. 6 No. 2 (2026): JagoMIPA: Jurnal Pendidikan Matematika dan IPA
Publisher : Yayasan Pendidikan Bima Berilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53299/jagomipa.v6i2.4667

Abstract

Penelitian ini bertujuan untuk mendeskripsikan hasil standarisasi instrumen tes kemampuan berpikir kritis dan skala self-confidence siswa pada materi persamaan garis lurus kelas VIII. Metode penelitian yang digunakan adalah deskriptif dengan pendekatan kuantitatif, melibatkan sampel sebanyak 31 responden di SMP swasta Bekasi. Prosedur penelitian mencakup validasi kualitatif melalui expert judgment oleh tiga akademisi dan validasi kuantitatif melalui uji coba empiris. Hasil validasi isi menggunakan koefisien Aiken’s V menunjukkan nilai antara  untuk instrumen tes dan  untuk instrumen non-tes, yang mengategorikan keduanya dalam klasifikasi sangat valid. Berdasarkan uji validitas empiris, seluruh butir soal tes (8 butir) dan angket (15 butir) dinyatakan valid dengan nilai . Pengujian reliabilitas menggunakan Cronbach's Alpha menghasilkan nilai  untuk instrumen tes dan  untuk instrumen non-tes, yang menunjukkan tingkat konsistensi tinggi. Simpulan dari penelitian ini adalah instrumen kemampuan berpikir kritis dan self-confidence yang dikembangkan telah memenuhi syarat validitas dan reliabilitas yang ketat, sehingga layak digunakan sebagai perangkat evaluasi yang akurat dalam pembelajaran matematika untuk meminimalkan bias pengukuran dan memastikan ketepatan alat ukur.
PENGEMBANGAN INSTRUMEN BERBASIS PEMBELAJARAN KONTEKSTUAL UNTUK MENINGKATKAN KETERAMPILAN KOMUNIKASI MATEMATIS SISWA SMP Nabil Makarim; Flavia Aurelia Hidajat; Pinta Deniyanti Sampoerno
SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Vol. 6 No. 3 (2026)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia (P4I)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/science.v6i3.12024

Abstract

Mathematical communication skills are fundamental competencies that need to be developed from the junior high school level; however, evaluation instruments specifically designed to measure these skills remain scarce. This study aimed to develop a contextual learning-based test instrument to measure the mathematical communication skills of seventh-grade junior high school students on algebra material. This study employed a research and development approach, encompassing stages of blueprint construction, expert validation by three mathematics education lecturers, and a field trial involving 35 seventh-grade students of SMPN 1 Citeureup as trial subjects, selected through purposive sampling. Data were analyzed using Pearson correlation, Cronbach's Alpha, discrimination power test, and difficulty level test through SPSS 25. The results indicate that the developed instrument is valid and reliable, and is therefore suitable for measuring students' mathematical communication skills. Nevertheless, several items still require revision in terms of discrimination power and difficulty level in order to make the instrument more optimal in fostering the improvement of junior high school students' mathematical communication skills. ABSTRAK Keterampilan komunikasi matematis merupakan kompetensi fundamental yang perlu dikembangkan sejak jenjang SMP, namun ketersediaan instrumen evaluasi yang dirancang secara spesifik untuk mengukur keterampilan tersebut masih sangat terbatas. Penelitian ini bertujuan mengembangkan instrumen tes berbasis pembelajaran kontekstual untuk mengukur keterampilan komunikasi matematis siswa SMP kelas VII pada materi aljabar. Penelitian ini menggunakan pendekatan penelitian dan pengembangan (research and development) yang mencakup tahapan penyusunan kisi-kisi, validasi ahli oleh tiga dosen Pendidikan Matematika, dan uji coba lapangan yang melibatkan 35 siswa kelas VII SMPN 1 Citeureup sebagai subjek uji coba yang dipilih menggunakan teknik purposive sampling. Data dianalisis menggunakan korelasi Pearson, Cronbach's Alpha, uji daya pembeda, dan uji tingkat kesukaran melalui aplikasi SPSS 25. Hasil penelitian menunjukkan bahwa instrumen yang dikembangkan bersifat valid dan reliabel sehingga layak digunakan untuk mengukur keterampilan komunikasi matematis siswa. Meskipun demikian, beberapa butir soal masih memerlukan revisi pada aspek daya pembeda dan tingkat kesukaran agar instrumen menjadi lebih optimal dalam mendorong peningkatan keterampilan komunikasi matematis siswa SMP.
Development of Local Instruction Theory Teaching Materials to Improve Mathematical Problem-Solving Ability Dwi Antari Wijayanti; Mimi Nur Hajizah; Pinta Deniyanti Sampoerno
Mosharafa: Jurnal Pendidikan Matematika Vol. 14 No. 1 (2025): January
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/mosharafa.v14i1.2510

Abstract

Penelitian ini dilakukan untuk mengatasi kurangnya bahan ajar kontekstual yang dapat mendukung kemampuan pemecahan masalah siswa melalui pengalaman belajar yang bermakna. Tujuan dari penelitian ini adalah mengembangkan bahan ajar berbasis Local Instruction Theory (LIT) yang valid, praktis, dan efektif dalam meningkatkan kemampuan pemecahan masalah matematis. Penelitian ini menggunakan metode penelitian dan pengembangan (R&D) dengan model ADDIE, dan dilaksanakan pada bulan Maret hingga Juni 2024 di SMP Negeri 216 Jakarta. Subjek penelitian adalah 66 siswa kelas VIII yang dibagi ke dalam kelompok eksperimen dan kelompok kontrol. Teknik pengumpulan data meliputi angket validasi ahli, angket respon siswa, dan tes pemecahan masalah matematis. Data dianalisis secara kuantitatif melalui skala Likert, uji normalitas dan homogenitas, serta uji t sampel independen. Hasil penelitian menunjukkan bahwa bahan ajar yang dikembangkan memiliki tingkat validitas sangat tinggi (87,72%), kepraktisan tinggi (88,9%), dan efektif dalam meningkatkan kemampuan pemecahan masalah, ditunjukkan dengan perbedaan skor posttest yang signifikan antara kelompok eksperimen dan kontrol. Penelitian ini menyimpulkan bahwa bahan ajar berbasis LIT mampu meningkatkan kemampuan pemecahan masalah matematis siswa dan direkomendasikan untuk diimplementasikan dalam pembelajaran matematika secara lebih luas. This research was conducted to address the lack of contextual teaching materials that can support students' problem-solving abilities through meaningful learning experiences. The purpose of this research is to develop teaching materials based on Local Instruction Theory (LIT) that are valid, practical, and effective in improving mathematical problem-solving abilities. This research used a research and development (R&D) method with the ADDIE model, and was conducted from March to June 2024 at SMP Negeri 216 Jakarta. The research subjects were 66 eighth-grade students who were divided into experimental and control groups. Data collection techniques included expert validation questionnaires, student response questionnaires, and mathematical problem-solving tests. Data were analyzed quantitatively using a Likert scale, normality and homogeneity tests, and independent sample t-tests. The results showed that the developed teaching materials had a very high level of validity (87.72%), high practicality (88.9%), and were effective in improving problem-solving skills, as indicated by a significant difference in posttest scores between the experimental and control groups. This study concluded that LIT-based teaching materials were able to improve students' mathematical problem-solving skills and were recommended for broader implementation in mathematics learning.
ANALISIS ILUSI NUMERASI TERHADAP AKUMULASI UTANG MAJEMUK AKIBAT PERSEPSI RENDAH PADA BUNGA PINJAMAN ONLINE Inaya Akbar; Reny Ramadhani; Selena Nuria Aline; Tiara Husnul Khotimah; Pinta Deniyanti Sampoerno; Debby Agustine
Jurnal Ilmiah Multidisiplin Ilmu Vol. 3 No. 3 (2026): Juni : Jurnal Ilmiah Multidisiplin Ilmu (JIMI)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/yvdqba47

Abstract

The rapid growth of online lending platforms in Indonesia has created new challenges in the form of systemic debt trap risks due to low financial literacy and cognitive biases. This study aims to analyze the influence of the illusion of numeracy on perceptions of online loan interest rates and its impact on the accumulation of compound debt. Using a qualitative method with a descriptive-analytical approach, data were collected through in-depth interviews with three categories of informants: mathematics students, non-mathematics students, and the general public. The findings reveal a strong phenomenon of the numeracy illusion, where informants tend to get trapped by the framing of small nominal numbers (daily interest) without converting time units or understanding the exponential nature of compound interest. Most informants use a linear thinking approach in estimating interest burdens, causing them to underestimate total financial obligations. This study concludes that critical mathematical literacy is not merely the ability to perform calculations, but rather the foundation of rationality in decision-making within the digital ecosystem. These results recommend the need for a mathematics education model that is more relevant to the contemporary financial context, as well as more transparent consumer protection policies. 
The Effectiveness of Banten Culture-Based Ethnomathematics Teaching Materials for Learning the Pythagorean Theorem Dinar Nirmalasari; Pinta Deniyanti Sampoerno; Makmuri Makmuri; Hepsi Nindiasari; Ade Nandang Mustafa
Journal of Mathematics Instruction, Social Research and Opinion Vol. 5 No. 3 (2026): September
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v5i3.1819

Abstract

Mathematics learning requires instructional approaches that enable students to understand abstract concepts through meaningful experiences. Ethnomathematics offers opportunities to connect mathematical ideas with cultural contexts; however, previous studies have largely focused on identifying mathematical concepts in cultural objects, while empirical evidence on the effectiveness of culture-based instructional materials remains limited. This study aimed to examine the effectiveness of Banten culture-based ethnomathematics video instructional materials in learning the Pythagorean Theorem. This study employed a posttest-only quasi-experimental design involving 60 eighth-grade students from a junior high school in Banten, Indonesia. The participants were divided into an experimental group ( ) and a control group ( ), with initial equivalence examined using Mid-Semester Test scores. Data were collected through a validated essay test and analysed using descriptive statistics, assumption tests, and an independent samples t-test. The experimental group achieved a higher mean posttest score (66.98) than the control group (46.11). The difference was statistically significant, , , with a large effect size (Cohen’s d = 0.95). The findings indicate that the developed instructional materials significantly improved students’ learning outcomes compared with conventional textbook-based instruction. However, the study was limited to one school and a relatively small sample. Future studies should involve broader contexts and additional learning variables.
Co-Authors Ade Nandang Mustafa Aris Hadiyan Wijaksana Azzahra, Yuvita Debby Agustine Dinar Nirmalasari Dwi Antari Wijayanti Dwi Jeanita Sengkey Ellis Salsabila, Ellis Flavia Aurelia Hidajat, Flavia Aurelia Gharitza Zahira Shofa Gufron, Ahmad Gusnia, Farida Haeruman, Leny Dhianti Hajizah, Mimi Nur Hakim, Lukman El Hepsi Nindiasari Inaya Akbar Khoirunnisa , Mustika Laila Rahmi S Lukita Ambarwati Lukman El Hakim Maemonah, Maemonah Makmuri Meidianingsih, Qorry Meilani, Ajeng Nabil Makarim Nurjanah, Egi Annisa Pakpahan, Ruth Yolanda Sari Permana, Agus Agung Rahmi, Fathur Reny Ramadhani Rizka A Selena Nuria Aline Silvira Hakim Siti Anisah Sofiatun, Siti Sofyan Husein Nasution Tian Abdul Aziz Tiara Husnul Khotimah Tika Kurnia Amaliyah Tri Fauji Vera Maya Santi Vivied Eka Pratiwi Yusufira Aldona