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All Journal Journal of Education and Learning (EduLearn) Edumatsains Martabe : Jurnal Pengabdian Kepada Masyarakat Journal of Educational Research and Evaluation Jurnal Riset Pendidikan dan Inovasi Pembelajaran Matematika (JRPIPM) Range : Jurnal Pendidikan Matematika Al Jahiz: Journal of Biology Education Research Brillo Journal Jurnal Pengabdian Sains dan Humaniora Jurnal Pengabdian Pada Masyarakat International Journal of Didactic Mathematics in Distance Education
Candra Ditasona
Universitas Kristen Indonesia
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From Definition to Need: Redefining the Selected Topics in Mathematics Education Course Through Students’ Mastery Profiles Santri Chintia Purba; Candra Ditasona; Stevi Natalia
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.v10i2.7489

Abstract

This study aims to analyze mathematics education students’ mastery of high school mathematical content and their readiness to teach it, as a basis for redefining the design of the Selected Topics in Mathematics Education (Kapita Selekta) course. A quantitative descriptive survey design was employed involving 14 mathematics education students at Universitas Kristen Indonesia who were enrolled in the Kapita Selekta II course. Data were collected using a questionnaire that assessed students’ mastery and willingness to learn and teach 32 high school mathematics topics. Descriptive statistics were used to determine the percentage of mastery and non-mastery for each topic. The findings reveal that only 40.13% of topics were mastered, while 59.87% showed a lack of mastery. Students demonstrated stronger understanding in algebraic and symbolic topics such as sequences, exponents, relations, and matrices, but weaker performance in geometry, trigonometry, and calculus-related topics. Despite these gaps, all respondents expressed a willingness to improve their mastery of mathematical content, with 42.9% being very willing and 57.1% willing to do so. These results suggest that the Kapita Selekta course should not be limited to topic selection based on theoretical definitions. Instead, it should be redesigned to respond to students’ actual mastery profiles and learning needs. By aligning course content with diagnostic data, the program can strengthen students’ mathematical competence and pedagogical readiness to teach effectively at the high school level.
Pedagogical Content Knowledge (PCK) of Prospective Science Teachers in ASEAN to Realize Sustainable Development Action Riska Septia Wahyuningtyas; Manogari Sianturi; Elferida Sormin; Candra Ditasona; Santri Chintia Purba; Stevi Natalia; Merle L. Junsay; Rene Estomo; Hotmaulina Sihotang
Al Jahiz Vol 6 No 2 (2025): Al-Jahiz: Journal of Biology Education Research, July-December 2025
Publisher : Faculty of Tarbiyah and Teacher Training UIN Jurai Siwo, Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/al-jahiz.v6i2.10933

Abstract

Prospective science teachers must master pedagogical knowledge (PK) and content knowledge (CK), commonly referred to as Pedagogical Content Knowledge (PCK), before entering the teaching profession. PCK is essential professional knowledge that supports effective science teaching. This study aims to analyze the PCK readiness of prospective science teachers in Indonesia and the Philippines, with a focus on the CK and PK competencies required for teaching in the ASEAN context. The study employed a mixed-methods approach. Survey data were collected from 110 prospective science teachers undertaking field teaching practice in schools in Indonesia and the Philippines. In addition, in-depth interviews were conducted with 12 participants, consisting of six prospective teachers from each country. The data focused on participants’ understanding and preparation related to pedagogical skills and science subject matter. The results indicate that the overall PCK level of prospective science teachers falls within the “moderately ready” category. However, the proportion of participants classified as “ready” remains relatively low, ranging from 44.9% to 58.5%. These findings suggest a need for strengthening both PK and CK among prospective science teachers. Enhancing PK can be achieved through additional pedagogical education and targeted training programs to improve teaching skills. Meanwhile, improving CK can be supported by providing more specialized science content courses aligned with school curricula prior to teaching practice. PCK readiness plays a crucial role in supporting sustainable development. Beyond integrating pedagogy and content, PCK enables prospective teachers to effectively convey scientific concepts related to sustainability issues: climate change, natural resource conservation, environmentally friendly technologies.
Students’ Perceptions of Green Chemistry in a Project-Based Learning (PjBL) Model Integrated with Local Culture Simanjuntak, Familia Novita; Candra Ditasona; Sri Rejeki Ignasia Sitohang; Angelia Patricia Situmorang
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 4 (2026): April
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i4.7168

Abstract

The purpose of this study is to examine how students see studying green chemistry using a culturally integrated project-based learning (PjBL) approach. This study used a qualitative descriptive methodology and was carried out at Don Bosco High School in Jakarta. A saturation sampling strategy was used to choose a sample of 35 tenth-grade science students. Students' written reflections after the PjBL exercises and observations made during the learning process were used to gather data. Data reduction, data presentation, and conclusion drawing were the phases of data analysis. The study's findings show that students' perspectives of studying chemistry have changed from being initially seen as challenging and abstract to being more relevant and significant. While some difficulties with group cooperation were still noted, the majority of students showed active involvement and positive responses throughout the learning process, as evidenced by increased interest, curiosity, and participation in project activities. More than half of the students selected the composting project as their final result, and they were able to connect it to actual environmental problems, especially how organic waste is managed in everyday life and cultural customs. These results show that the use of culturally integrated PjBL promotes collaborative and relevant learning experiences in addition to giving students a more practical understanding of green chemistry principles. As a result, this teaching approach helps students develop more favorable opinions of chemistry and strengthens the link between scientific ideas and practical applications.
Application of the Newton–Raphson Method to Compare Effective Interest Rates for Motorcycle Installments Tampubolon, Monica Noviyanti; Candra Ditasona; Siregar, Jeny; Simbolon, Rido
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 4 (2026): April
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i4.7808

Abstract

Purchasing a motorcycle on credit is a popular option for many people in Indonesia. However, information about financing provided to consumers usually only includes the down payment amount, monthly installments, and credit term, without providing details about the effective interest rate. This makes it difficult for consumers to compare different credit schemes fairly. This study aims to use the Newton-Raphson method to determine and compare the effective interest rates of Honda Beat CBS and Yamaha Mio M3 CW motorcycle installments. The data used in this study was taken from official financing brochures for a 23-month period. The effective interest rate was determined by solving nonlinear equations for fixed installment loans using the Newton-Raphson method. The results of the study show that although the monthly installments for both motorcycles are quite similar, there are differences in effective interest rates that cannot be seen directly from the installment amounts. The Newton-Raphson method has been proven to provide accurate and structured solutions that are easy to use. Therefore, this method can be used as an objective tool for analyzing and comparing motorcycle credit financing.
Improving Mathematics Learning Outcomes Through Interactive Electronic Modules Based on Constructivism and Cone of Experience Bela Desy Natalia; Candra Ditasona; Stevi Natalia
Jurnal Riset Pendidikan dan Inovasi Pembelajaran Matematika Vol. 9 No. 2 (2025): JRPIPM DESEMBER 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrpipm.v9n2.p227-241

Abstract

Indonesia is projected to achieve its golden era by 2045, necessitating significant adaptation and transformation in cultivating high-quality human resources through education. However, the persistent issue of low mathematics achievement and the predominance of Teacher-Centered Learning (TCL) approaches at SMAN 14 Jakarta highlights the need for educational innovation. This study aims to design and develop an interactive electronic module grounded in constructivist pedagogy by incorporating Edgar Dale's Cone of Experience to enhance students' proficiency in the topic of counting principles. Key challenges include limited conceptual comprehension among students, inadequately aligned learning resources, and assessment strategies that fail to reflect instructional objectives. Employing a Research and Development (RnD) methodology, this study adopts the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation) for systematic module development. The findings demonstrate that the module exhibits excellent validity, with mean scores for content, media, and language validation of 3.6, 3.9, and 3.8, respectively. The module further demonstrates substantial effectiveness, achieving a 70% improvement rate based on the n-gain test, which highlights a statistically significant enhancement in students' learning outcomes. Additionally, the practicality assessment yields high practicality, with an r-value exceeding the r-table and a practicality percentage of 92%. This study concludes that the developed module is highly effective in improving mathematical achievement, exhibits practical utility in instructional settings, and possesses robust validity for educational implementation.
Development of an Augmented Reality-Enhanced Interactive E-Module on the Polyhedron Topic to Maximize Learning Styles Candra Ditasona; Bintang Pratama; Santri Chintya Purba
RANGE: Jurnal Pendidikan Matematika Vol. 8 No. 1 (2026): Range Juli 2026
Publisher : Pendidikan Matematika UNIMOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jpm.v8i1.10135

Abstract

When studying polyhedron, learning sources that are predominantly verbalistic can lead to difficulties in understanding the concept. Learners have diverse learning preferences for absorbing and processing information, known as learning styles. Therefore, learning media is required to accommodate features oriented towards the learning needs of the students encompass text, audio, video, animations, images, and augmented reality. This research aims to develop a valid and suitable e-module on polyhedron for maximizes students’ learning styles. This research is included in the limited research type that only focus-es on the development and validation stages without involving testing. The model supporting this level of this research is proposed by Richey and Klein, wherein the research phase is limited to evaluation. Throughout the research and development phases, the e-module is validated by content and media ex-perts. During the evaluation stage, every element produced in the e-module for flat-sided of three-dimensional shapes is found to be valid and highly suitable for accommodating students learning style. The result allows the identification of how each feature in the e-module supports visual, auditory, and kinesthetic learning styles.
Technological Knowledge Among Mathematics Pre-Service Teachers in Indonesia and the Philippines: A Comparative Study Candra Ditasona; Santri Chintia Purba; Stevi Natalia; Hotmaulina Sihotang; Merley Junsay; Rene T Estomo
Brillo Journal Vol 4 No 2 (2025): Innovative Practices in Mathematics Teaching and Learning
Publisher : S&Co Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/bj.v4i2.111

Abstract

This comparative study investigates the Technological Knowledge (TK) readiness of mathematics pre-service teachers in Indonesia and the Philippines. Using a structured online survey, data were collected from 136 participants in Indonesia and 93 in the Philippines. TK readiness was categorized into three levels: Ready, Moderately Ready, and Not Ready, with demographic factors such as age, sex, and school type examined as potential influences. The results indicate that Indonesian pre-service teachers demonstrate higher TK readiness compared to their Filipino counterparts. No statistically significant associations were found between TK readiness and demographic variables in either country. The findings suggest a need for targeted interventions in teacher education programs to enhance TK competencies and ensure effective technology integration in mathematics classrooms. Implications for curriculum design and future research are discussed.
Co-Authors Aneliana, Aneliana Angelia Patricia Situmorang Ayu ArthaSari Beangelita Napitupulu Bela Desy Natalia Bintang Pratama Bitman Manullang Bryan C Tugelida, Nel Dameria Sinaga Daniel, Stepanus Darhim Darhim Elferida Sormin Familia Novita Simanjuntak Han Nio, Tan Hendrikus Male, Hendrikus HOTMAULINA SIHOTANG Hotmaulina Sihotang Indah Pratiwi Junsay, Merle Kerdid Simbolon Kornelius Anugrah Zebua Kristina, Nugra Heni Kusuma, Yaya S. Lumbantoruan, Jitu Halomoan Manogari Sianturi Martadiputra, Bambang Apiv Priatna Mayawi Farida Melda Simorangkir, Melda Merle L. Junsay Merley Junsay Metallica, Christina Nenden Suciyati Sartika Ninda Kristin Novita Simanjuntak, Familia Pardosi, Deborah Purba, Santri Chintia Rene Estomo Rene T Estomo Rian Nugroho, Andreas Riska Septia Wahyuningtyas Risma Uly Manalu, Risma Uly Ruth Ririn Vania Ruth Yuni Kartika Safitri, Mia Millawaty Santri Chintia Purba Santri Chintia Purba Santri Chintia Purba Santri Chintya Purba Setiawan, Laurencia Firstania Sianturi, Manogari Simbolon, Rido Siregar, Jeny Sri Rejeki Ignasia Sitohang Stevi Natalia Sunarto Sunarto Susilo Susilo Tampubolon, Monica Noviyanti Tugelida, Nel Bryan C Yaya S. Kusumah