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Dadan Dasari

Univeritas Pendidikan Indonesia

Author-ID : 2838049

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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The Effect of Project Based Learning on Changes in Self-regulated learning Nadyati Putri; Febrinna Marchy; Dadan Dasari; Cut Nadia Rachmi
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 7 No. 2 (2025): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v7i2.94

This study aims to examine the effect of Project Based Learning (PjBL) implementation on students' self-regulated learning in mathematics learning. Using a quasi-experimental design with Nonequivalent Pretest-Posttest Control Group Design, this study involved two classes of VIII grade students at SMP Negeri 5 Bandung. One class acted as an experimental class with the application of PjBL, while the control class used conventional learning with a scientific approach. Data were collected through pretest and posttest and attitude scale questionnaire, then processed using Mann-Whitney U nonparametric statistical test. The average N-gain of self-regulated learning in the PjBL class was 0.23, which was significantly higher than the conventional class's 0.16, according to the data. In conclusion, PjBL is effective in increasing students' self-regulated learning compared to conventional learning methods. Based on these findings, it is recommended that PjBL be implemented in the curriculum to support the development of students' self-regulated learning.

Meta-Analysis: The Effect of The Think Talk Write Learning Model on Students' Mathematics Learning Outcomes Yunia Jumita Ningrum; Dadan Dasari; Abdul Wahab A
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 7 No. 2 (2025): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v7i2.220

Students' low mathematics learning outcomes remain a major issue in education, highlighting the need for more effective and innovative instructional strategies. This study aims to explain the effect of Think Talk Write learning model on learning outcomes through the use of meta-analysis. This study presents a comprehensive meta-analysis to address the limitations of previous studies, which were largely contextual and lacked a thorough quantitative overview of the effectiveness of the Think Talk Write model on students' mathematics learning outcomes. This article quantitatively analyzes the effect of the Think Talk Write model, provides a description of the data on sample size, mean, and standard deviation, and is published in a Google Scholar indexed journal. In this analysis, mean difference, Forrest plot, and publication bias were calculated using JASP software and Excel manual calculation. The results of the analysis showed that the value of I2 = 94.441 with a confidence of 0.95%. The forest plot showed a mean effect of 1.39, and the study effect size values ranged between 0.76 and 2.01. This shows that there is a significant difference between learning with the Think Talk Write model and conventional learning. In the group learning process, students who used the Think Talk Write model had better learning outcomes than students who did not use it. The analysis shows that Think Talk Write model is very important to support learning.

Identifikasi Profil Sikap Siswa Terhadap Matematika Ariyanti Jalal; Dadan Dasari
Kalam Cendekia: Jurnal Ilmiah Kependidikan Vol 13, No 2 (2025): Kalam Cendekia: Jurnal Ilmiah Kependidikan
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkc.v13i2.103529

Penelitian ini merupakan penelitian deskriptif yang bertujuan untuk mendeskripsikan sikap siswa VIII MTs Makharimal Akhlak Morotai Maluku Utara terhadap matematika. Konten matematika yang sulit dipelajari menjadi salah satu faktor siswa cenderung bersikap negatif terhadap matematika. Pengukuran sikap siswa menggunakan data angket skala Likert yang terdiri dari tiga aspek yaitu pandangan siswa terhadap matematika, menyukai pelajaran matematika, dan minat siswa belajar matematika yang disebar ke 27 siswa. Hasil dari penelitian ini bahwa dari 27 siswa diperoleh siswa yang memiliki sikap positif dan positif sebanyak 14 siswa (51,85%), sedangkan siswa yang bersikap negatif dan sangat negatif terhadap matematika sebanyak 13 siswa (48,15%). Hasil ini menyimpulkan bahwa sikap siswa kelas VIII MTs Makharimal Akhlak terhadap matematika cenderung lebih banyak daripada yang bersikap negatif meskipun perbedaannya sangat kecil.

THE EFFECT OF LEARNING MOTIVATION TOWARDS STUDENTS’ MATHEMATICS PROBLEM-SOLVING ABILITY: META-ANALYSIS CORRELATIONAL STUDY Neza Zakiya Arili; Turmudi Turmudi; Dadan Dasari
EDU-MAT: Jurnal Pendidikan Matematika Vol 12, No 1 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/edumat.v12i1.16556

Studies emphasize that learning motivation is one of the primary elements that affect the achievement of learning objectives and at the same time, influences the skill of mathematical problem-solving. Research on the correlation between mathematical problem-solving and learning motivation despite numerous attempts at solutions, the correlation value is heterogeneous, making it inconsistent. This study aims to summarize the effect-size values obtained based on the main research through the correlation meta-analysis method. The literature data collection technique used the Google Scholar database which was selected using the inclusion criteria. Primary studies that fit the criteria consisted of 20 studies published in journals, proceedings, and theses from 2016 to 2022. Three steps of data analysis, including publication bias research, random or fixed effect models, and statistical hypothesis testing, were conducted using the Jeffreys Amazing Statistics Program (JASP) program. The results of the study show that there is a positive influence of learning motivation on students' mathematical problem-solving abilities at the elementary, middle, and high school levels in Indonesia in the moderate category (r = 0,56; p < 0,01). The results of this study suggest educators to further optimize students' learning motivation because learning motivation influences the level of students' mathematical problem-solving ability. Keywords: Learning motivation, mathematical problem-solving, problem-solving, meta-analysis

Primary School Teachers Preparedness in Performing Online Learning: The Case of Teachers in Jakarta Area: Kesiapan Guru Sekolah Dasar dalam Melaksanakan Pembelajaran Daring: Studi Kasus Guru di Wilayah Jakarta Nurafni; Dadan Dasari; Dadang Juandi; Yaya Sukjaya Kusuma; Turmudi; Al Jupri
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 2 (2025): October
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i2.7274

Teachers do not simply conduct online or remote learning by delivering materials to learners, but rather through optimal preparation to ensure effective implementation. The shift to long-distance learning during the Covid-19 pandemic required teachers to master their subject matter, align personal interests and talents with educational goals, and demonstrate a positive professional attitude. This study aimed to determine the readiness of primary school teachers in implementing online learning during the Covid-19 pandemic. Using a quantitative survey design, the research was conducted in primary schools across the Jakarta metropolitan area (Jakarta, Bogor, Depok, Tangerang, Bekasi). Participants (n=280) were selected using a combination of random and convenience sampling techniques. Data were collected using the Teacher Readiness for Online Learning Measurement (TROLM) instrument developed by Ming Hu in 2015 and analyzed using percentage calculations. The results showed that teachers demonstrated emotive attitudinal readiness of 54.4%, cognitive readiness of 55.9%, and behavioral readiness of 51.5%, indicating that overall, they are well-prepared to implement online learning. Based on these findings, it is recommended that continuous professional development, adequate digital infrastructure, and sustainable policy guidelines be provided to further enhance teachers’ digital pedagogical competencies and ensure the long-term effectiveness of online learning beyond the pandemic context

Pedagogical Content Knowledge In Teaching Systems of Linear Equations: A Case of Secondary School Mathematics Teachers Marhami; Jarnawi Afgani Dahlan; Dadan Dasari
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 3 (2026): January
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i3.7712

This study aims to examine the Pedagogical Content Knowledge (PCK) of teachers in teaching the Two-Variable Linear Equation System (TVLES) material. A descriptive qualitative approach was employed, involving three mathematics teachers who taught TVLES to eighth-grade junior high school students. Data were collected through semi-structured interviews as well as analysis of instructional portfolios, including lesson plans, worksheets, and teaching materials related to TVLES. The interview protocol consisted of ten questions based on the five components of PCK: orientation to teaching, curriculum knowledge, knowledge of students’ understanding, knowledge of instructional strategies, and knowledge of assessment. The data analysis followed the stages of data collection, reduction, presentation, verification, and conclusion drawing. Data validity was ensured through time triangulation and the use of multiple data sources. The results revealed that teachers demonstrated adequate competency in three PCK component (orientation to teaching, knowledge of students’ understanding, and assessment knowledge), while curriculum knowledge and instructional strategies remained underdeveloped. Based on these findings, it is recommended to establish collaborative forums and provide ongoing mentoring to help teachers enhance their curriculum knowledge and instructional practices. Curriculum developers should also ensure that teachers have sufficient resources and support to implement TVLES materials effectively in the classroom.

Exploring student learning obstacles in solving mathematical reasoning problems on squares and rectangles Rahma Adinda Sartika; Dadan Dasari
Research and Development in Education (RaDEn) Vol. 5 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/raden.v5i2.41437

Mathematical reasoning ability is an essential foundation that every student must master. However, the reality in the field shows that many students still struggle when dealing with reasoning problems, even on basic geometry topics such as squares and rectangles. Therefore, this study aims to deeply analyze the learning obstacles experienced by students when solving reasoning problems related to squares and rectangles. This research uses a qualitative descriptive method that allows for an in-depth exploration of the phenomena being studied. The instruments used are specially designed problems concerning squares and rectangles, aimed at measuring indicators of students’ mathematical reasoning abilities. Data were collected through student ability tests, interviews, and supporting documentation. The subjects of the study consisted of 32 junior high school students in Bandung City. The data analysis revealed that students experienced several learning obstacles, namely an inability to apply the correct concepts or formulas, indicating weak conceptual understanding, as well as frequent errors in mathematical notation or symbols and in mathematical operations. Based on these findings, the study concludes that students face three main types of learning obstacles: instrumental ontogenic obstacles, conceptual ontogenic obstacles, and epistemological obstacles.

Development of Group Investigation-Based Mathematics E-Comic to Improve Mathematical Representation Skills of Junior High School Students Rasilah Rasilah; Yaya S. Kusumah; Dadang Juandi; Dadan Dasari
Journal of Mathematics Instruction, Social Research and Opinion Vol. 5 No. 1 (2026): March
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v5i1.954

Mathematics plays a fundamental role in developing logical, analytical, and systematic thinking; therefore, mathematics learning should emphasize not only procedural mastery but also meaningful conceptual understanding. One essential process standard in mathematics learning is mathematical representation, as it enables students to organize ideas, communicate reasoning, and transform abstract concepts into visual, verbal, and symbolic forms. In plane geometry, particularly quadrilaterals, many students experience difficulties in drawing accurate figures, linking geometric properties to formulas, and translating contextual problems into mathematical models. In addition to cognitive challenges, affective factors such as low perseverance and the tendency to give up easily indicate the need to strengthen students’ mathematical resilience. This study aimed to develop a group investigation–based mathematics e-comic for quadrilateral topics at the junior high school level and to examine its feasibility and effectiveness. The research employed a Research and Development (R&D) approach using the ADDIE model, consisting of analysis, design, development, implementation, and evaluation stages. The product was validated by subject-matter experts and media experts and implemented with 32 seventh-grade students at SMP NU Darul Ma’arif. Data were collected through validation sheets, teacher and student response questionnaires, and learning evaluations. The results indicate that the developed e-comic meets high feasibility criteria and receives positive responses from teachers and students. The integration of narrative visuals with group investigation activities enhances engagement, supports students’ understanding of quadrilateral concepts, and encourages active participation and discussion. Therefore, the proposed e-comic is suitable as an alternative learning medium for junior high school mathematics instruction.

Mathematics Learning Innovation through Group Investigation-Based E-Comic Media to Improve Junior High School Students' Resilience Rasilah; Yaya S. Kusumah; Dadang Juandi; Dadan Dasari; Jajang Rahmatudin
Jurnal Iqra' : Kajian Ilmu Pendidikan Vol. 11 No. 1 (2026): Jurnal Iqra' : Kajian Ilmu Pendidikan
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/ji.v11i1.7227

This study aims to develop and test the effectiveness of integrated mathematics learning media based on E-Comics with the Group Investigation learning model in improving mathematics retention and learning outcomes of junior high school students. The research method used is Research and Development (R&D) with the ADDIE model which includes the stages of analysis, design, development, implementation, and evaluation. The product developed is a learning tool consisting of a syllabus, lesson plans, student worksheets (LKPD), mathematics e-comics, and a mathematical ability representation test. The subjects of this study were seventh-grade students of SMP Darul Ma'arif Indramayu NU in the 2025/2026 academic year. Data were collected through expert validation sheets, student response questionnaires, observations of learning implementation, and pretests and posttests. The results of the study indicate that the mathematics media based on the Group Investigation E-comics was declared very valid by experts in terms of material, media, and language with an average value above 88%. The media was also declared practical and a good learning implementation based on positive student responses. After being tested for its effectiveness, the mathematics e-comics were able to improve students' resilience in mathematics by increasing perseverance, motivation, and positive attitudes in solving mathematical problems. The contribution of this study is to make learning more effective, especially for materials that are considered boring or complex for students. Thus, the mathematics learning media based on the Group Investigation E-comics model is worthy of being used as an innovative alternative in junior high school mathematics learning.

Integrating Realistic Mathematics Education (RME) in E-Comic Media: A Novel Approach to Foster Mathematical Creativity Siswanto, Rizki Dwi; Kusumah, Yaya S; Dasari, Dadan; Juandi, Dadang; Hendriyanto, Agus; Bayuaji, Luhur
Journal of Educational Technology and Learning Creativity Vol. 3 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jetlc.v3i2.2492

Purpose of the study: This study aims to examine the effectiveness of integrating Realistic Mathematics Education (RME) into e-comic media for junior high school students in Jakarta in order to foster mathematical creativity and improve students’ ability to connect mathematical concepts with real-life situations. Methodology: This study employed a Research and Development (R&D) design using the ADDIE instructional model to develop RME-based e-comic media. The product was implemented with junior high school students in Jakarta, and data on mathematical creativity and learning responses were collected using creativity tests, questionnaires, classroom observations, and analyzed using descriptive and inferential statistics. Main Findings: The results indicate that RME-based e-comic media significantly improved students’ mathematical creativity across all indicators, including fluency, flexibility, originality, elaboration, and insight. Students showed higher learning motivation, more active engagement in discussions, and an increased ability to relate mathematical concepts to daily life, while teachers reported more dynamic classroom interactions, participation, and collaboration. Novelty/Originality of this study: This study introduces an innovative integration of Realistic Mathematics Education with interactive e-comic media to foster mathematical creativity in junior high school students. It advances mathematics education by demonstrating how context-rich, visually engaging digital narratives can transform conventional instruction into student-centered, creativity-oriented learning experiences and provides a scalable model for technology-enhanced, creativity-focused mathematics instruction.

Co-Authors Aan Hasanah Abdul Wahab A Abdurrahman do muhamad Naser Abdurrahman Do. Muhamad Naser Agus Hendriyanto AHMAD LUTFI Ahmad Lutfi Ahmad Mukhibin Ahmad Mukhibin, Ahmad Alliseu Umiyati Ambarwati, Dela Ariyanti Jalal Aswin Aswin Atika Defita Sari Bahar, Afipa Amalia bambang avip Priatna Budi Rianto Christina Monika Christina Monika Samosir Cut Nadia Rachmi Dadang Juandi Dadang Juandi Dadang Juandi Dadang Junadi Dameria Elisabeth Simanjuntak Darhim Darhim Dela Ambarwati Desy Lusiyana, Desy Dewi, Niken Shofiana Didi Suryadi Didi Suryadi Didi Suryadi Didi Suryadi Didi Suryadi Didi Suryadi Didi Suryadi Dika Faiz Himmawan Diki Mulyana Drajat, Widi Rahmawati Edi Supriyadi Eka Khairani Hasibuan Elah Nurlaelah Elah Nurlaelah Elsa Komala Elsa Komala, Elsa Endang Cahya Mulyaning Asih Enjun Junaeti Erika Yohanna Seventina Siahaan Eyus Sudihartinih Fadhil Zil Ikram Fatimah, Siti Fatmiyati, Novita Febrianti, Tri Sedya Febrinna Marchy Fitri, Rahmia Mulya Fitria Maghfiroh, Fitria Fitria, Nida Fitriani agustina Fitriasari, Putri Fitriyah, Yuni Freddy Prasetyo Freddy Prasetyo, Freddy Gita Rani Putri Mangiri Gita Safitri Gunadi, Farid Hafilah, Putri Harahap, Maulana Al Aziz Hasya Nur Auliya Hendriyanto, Agus Hidayat, Azhar Majid Himmawan, Dika Faiz Husna Fatwana Ilham Muhammad Ilham Muhammad Inayah, Clara fadhilah Inayah, Sarah Jajang Rahmatudin Jarnawi Afgani Dahlan Jarnawi Afgani Dahlan Jozua Sabandar Kakoma Luneta Khofifa Romaito Siregar Laia, Harun Onesimus Lethulur, Nelma Dortje Lia Ardiansari Lia Arista Lina Nurhayati Lomri, Yani Astika Lubis, Asep Ridwan Lucky Heriyanti Jufri, Lucky Heriyanti Luhur Bayuaji, Luhur Lukman hakim muhaimin Lukman Lukman Lutfi, Jasmine Salsabila Luthfiyati Nurafifah Ma'ulfi Kharis Abadi Magdalena Wangge Mansyur, Azizul Jabbar Marchy, Febrinna Mardliyah, Syifa Marhami Marhami Marhami, Marhami Maria Stella Yosefina Galus Maria TSN Ma’ulfi Kharis Abadi Mitrayana - Mufarrido Husnah Muhaimin, Lukman Hakim Muhammad Fajar Anugrah Mulia Putra N. Nurjanah Nadyati Putri Nanang Priatna Nar Herrhyanto Naser, Abdurrahman Do. Muhamad Neza Zakiya Arili ningrum, yunia jumita Nisa Azzahra Nora Susilowaty Novita Fatmiyati Nurafni Nurdiani, Nunung Nurdiani, Nunung Nurhayati, Hanifah Nurhayati, Lina Pahmi, Samsul Palupi Sri Wijayanti Palupi Sri Wijayanti, Palupi Sri Panjaitan, M. Azhari Patrisius Afrisno Udil, Patrisius Afrisno Pieter Zakarias Tupamahu Pujia Siti Balkist Putri, Mei Radia Rafi Kamindra Rahma Adinda Sartika Rahmat Fitra Rahmat Kusharyadi Raisya Hizkiya Syabina Ramdhan Fazrianto Suwarman Rani Sugiarni Rasilah Rasilah Rasilah, Rasilah Rayinda Khaerul Wiladah Bahrun Rianto, Budi Ridho, Muhamat Hidayatul Riki Andriatna Rita Novita Ritmayanti, Indah Rahmania Rizqi Dwi Maharani Rusyid, Husnul Khatimah Saffanah Pertiwi Safitri, Gina safitri, gita Samosir, Christina Monika Sani Sahara Saputra, Andari Saputri, Veni Sari, Atika Defita Sari, Merisa Ammelia Savitri, Gina Scristia, Scristia Shafa Salsabila sholikhakh, Rizqi Amaliyakh Siahaan, Erika Yohanna Seventina Silitonga, R. H. Yanti Simanjuntak, Sinitta Simbolon, Asep Siswanto, Rizki Dwi Siti Fatimah Solehudin Solehudin Sri Hastuti Noer Sri Yulianti Sufyani Prabawanto, Sufyani Surya Kurniawan Swasti Maharani, Swasti Syafdi Maizora Syafdi Maizora Syaiful Syifa Mardliyah Syufyani Prabawanto Tarmudi, Tarmudi Tatang Herman, Tatang Tia Purniati Tri Nova Hasti Yunianta Trysa Gustya Manda Turmudi Tuti Hartati Wahab A, Abdul Wangge, Magdalena Widyastuti Widyastuti Yani Astika Lomri Yaya S Kusumah Yaya S. Kusumah Yaya S. Kusumah Yaya S. Kusumah Yaya Sukjaya Kusuma Yaya Sukjaya Kusumah Yuce Sandra Yuni Fitriyah Yunia Jumita Ningrum

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