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Kurnia Putri Sepdikasari Dirgantoro

Program Studi Pendidikan Matematika, Fakultas Ilmu Pendidikan, Universitas Pelita Harapan

Author-ID : 623179

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Investigation of numeracy proficiency levels among elementary students through the PEMANTIK assessment tool Robert Harry Soesanto; Kurnia Putri Sepdikasari Dirgantoro
Journal of Honai Math Vol. 7 No. 1 (2024): Journal of Honai Math
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jhm.v7i1.521

Mathematics education is critical in nurturing a wide range of cognitive abilities, particularly numeracy skills, which are essential for students’ everyday lives. This study aimed to systematically evaluate the numeracy levels of elementary students at Lentera Harapan School (LHS) in Indonesia using the PEMANTIK assessment tool. A cross-sectional design with a phenomenological approach was applied, encompassing 4,279 students from Grades 1 to 6. The assessment tool comprised a numeracy test accessed through PEMANTIK, and the resulting data were analyzed using descriptive statistical techniques to map numeracy levels across different grades. Findings revealed that students in Grade 3 and above faced significant challenges in developing numeracy skills. The study also highlighted LHS's commitment to implementing evidence-based practices and pedagogical strategies to help teachers support students' numeracy skill development.

COMPARING STUDENTS’ PERFORMANCE IN SOLVING SYSTEMS OF LINEAR EQUATIONS WITH TWO VARIABLES BASED ON EPISTEMOLOGICAL BELIEFS Rosiyanti, Hastri; Dahlan, Jarnawi Afgani; Turmudi, Turmudi; Dirgantoro, Kurnia Putri Sepdikasari
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol. 15 No. 3 (2026)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v15i3.16249

Students’ difficulties in solving Systems of Linear Equations with Two Variables (SLETV) problems are often related not only to procedural understanding but also to their beliefs about knowledge and learning. This study examined differences in students’ academic performance in solving SLETV problems based on their levels of epistemological beliefs. The study used a quantitative survey design involving 70 junior high school students studying SLETV at a junior high school in South Tangerang, Indonesia. The researchers selected participants using simple random sampling from several classes taught by the same mathematics teacher. After screening, the researchers included 34 complete, valid responses in the analysis. Data were collected using the Epistemological Belief Questionnaire, which measured four dimensions of epistemological beliefs: time allocation, solution steps, conceptual understanding, and usefulness of mathematics, along with an SLETV achievement test. The data were analyzed using One-Way ANOVA and Tukey HSD post-hoc analysis. The results revealed significant differences in students’ academic performance based on their levels of epistemological beliefs (p < 0.05). Students with low epistemological beliefs performed significantly lower than students with moderate and high epistemological beliefs, while no significant difference was found between the moderate and high groups. The findings indicate that students with more developed epistemological beliefs were associated with better performance in solving SLETV problems, particularly compared with students with low epistemological beliefs. This study contributes to mathematics education research by providing contextual evidence regarding the role of epistemological beliefs in algebra learning. The findings indicate an association between students’ epistemological beliefs and their mathematical performance in solving SLETV problems.

Implementation of Missouri Mathematics Project in Reducing Students’ Mathematical Errors of Class VII-4 Based on Kastolan Theory Aprian Dwi Cahyo; Kurnia Putri Sepdikasari Dirgantoro
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 11 No 2 (2026): October
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v11i2.8340

This research is based on the facts that students often made mathematical errors when dealing with mathematical problems. It was implemented in class VII-4 which consists of 28 students with diverse background, academic abilities, interests, and learning style. Data was obtained through observations and interviews with mentor which showed need for reducing students’ mathematical errors. The Missouri Mathematics Project (MMP) strategy was implemented to reduce students’ mathematical errors through cooperative and individual works steps. The methods that are used in this study is descriptive research with qualitative approach to describe mathematical errors and it is combined with Kastolan theory as the way to analyze those errors. The analysis process used students’ results in formative and summative assessments as supporting data in describing students’ mathematical errors. The results of individual formative and summative assessments showed a substantial reduction in the rate of mathematical errors among students. On the other hand, students who initially did not achieve the Minimum Passing Score (MPS) on the formative assessment may achieve the MPS on the summative assessment. The implementation of MMP strategy showed improvement in terms of (1) students’ understanding about the material, (2) ability to work together, (3) ability to work individually, (4) reducing of students’ mathematical errors. Through this process, teacher realize the importance of systematic and holistic learning design so that it not only increases academic abilities but also forms a good character. As a follow-up, it is recommended to use MMP strategy integrated with technologies to further minimize students’ mathematical errors.

IMMANUEL TUTORIAL SERVICE OF ANUGERAH STUDY COURSE IN RAWACANA Oce Datu Appulembang; Kurnia P.S. Dirgantoro; Jacob Stevy Seleky; Novel Priatna
Jurnal Sinergitas PKM & CSR Vol. 1 No. 2 (2017): April : Jurnal Sinergitas PKM dan CSR
Publisher : Universitas Pelita Harapan

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

The low standart of living in scavenger area in Rawacana is affect children education in their family. Most of them are only get a modest education and even do not have the opportunity to get an education and drop out. Bu Honey and family have a desire to increase the standart of living of this community through education for local children. He has set up study huts in the scavenger area to help children get the informal education. Seeing the number of children who need to be educated in that place, so that they need the educators who are committed to teach in that place. Therefore, cooperation with Mathematics Education, FIP TC UPH facilitated by her husband as UPH lecturer Mr. Dylmoon through Community Service acrivity. The Mathematics Education Study Program provides educators as a tutor. They will help to teach the children in that study lodge every week. The purpose of this activity is to help children in their homework, to help understand the difficult lessons, to help children in installing a striving attitude through study hard and to reach out the children who do not get formal education in school so that they can experience the same education as those who attend school.

Developing an SDG-based Mathematical Literacy Assessment in Space and Shape Domain for Prospective Teachers Kurnia Putri Sepdikasari Dirgantoro; Robert Harry Soesanto; Margaretha Madha Melissa
Jurnal Didaktik Matematika Vol. 13 No. 2 (2026): Jurnal Didaktik Matematika
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v13i2.2681

Mathematical literacy (ML) is a central competence in mathematics education, particularly for prospective teachers. However, most ML assessment instruments target school students, leaving a gap in instruments designed specifically for prospective teachers. This study aimed to develop and empirically evaluate an ML assessment instrument integrating Sustainable Development Goals (SDGs)-related contexts within the Space and Shape domain. Using a research and development design, the instrument was developed through a literature review, expert validation, readability testing, and a pilot test with 29 prospective mathematics teachers who had completed a geometry course. Data were analyzed using Pearson’s product-moment correlation for item validity, Cronbach’s Alpha for internal consistency reliability, and descriptive statistics to examine performance by item and mathematical literacy process. Nine of the ten items demonstrated statistically significant item-total correlations, while one item was excluded from the reliability analysis. Cronbach’s Alpha was 0.813. Participants' mean performance was 74% in formulating mathematical situations, 65% in employing mathematics, and 58% in interpreting mathematical results. The findings provide initial evidence of the instrument's measurement properties and describe variations in prospective teachers' performance. Further testing with larger and more diverse samples is needed to establish broader applicability.

Application of GeoGebra-Assisted Problem-Based Learning Model to Strengthen the Learning Interest of Eighth Grade Junior High School Students Willy Ruben Sihombing; Kurnia Putri Sepdikasari Dirgantoro; Ebenezer Bonyah
International Journal of Geometry Research and Inventions in Education Vol. 2 No. 02 (2025)
Publisher : EDUPEDIA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56855/gradient.v2i02.1742

Learning interest is a psychological drive that allows students to learn something consciously, calmly, and with discipline. A lack of learning interest was observed in one school in West Jakarta. This is a significant issue as learning interest directly impacts the quality of education. Therefore, the purpose of this study is to investigate the application of a GeoGebra-assisted problem-based learning (PBL) model to enhance the learning interest of eighth-grade junior high school students. Additionally, the paper will discuss the application of this GeoGebra-assisted PBL model from a Christian perspective. This research utilizes a descriptive qualitative method, with data collected through observation sheets, lesson plans, and teacher reflection sheets. The analysis of the research data demonstrates the positive effect of the GeoGebra-assisted PBL model on learning interest. This is evidenced by observed changes in student behavior that align with the indicators of learning interest. Thus, it can be concluded that the application of the GeoGebra-assisted PBL model can foster and strengthen students' learning interest. The PBL model offers a platform for student exploration, with GeoGebra acting as a supportive tool. The diverse features of GeoGebra facilitate the learning process, thereby fostering a sense of enjoyment and interest. However, due to certain limitations in its application, educators must guide students in its use.

Co-Authors Agnes Monica Halawa Anditya, Novia Hoki Anin, Fendy Reza Aprian Dwi Cahyo Ayu, Philia Candra Sekar Banjarnahor, Evander Bermuli, Jessica Elfani Bou, Natasya Inggriani Rosarinda Diva Nathania Hartono Ebenezer Bonyah Engelina Engelina Ernie Bertha Nababan Hastri Rosiyanti Irene Kristina Telaumbanua Iswandi, Nivea Jacob Stevy Seleky Jarnawi Afgani Dahlan Jesica, Alvalerina Margaretha Madha Melissa Margaretha Madha Melissa Melda Jaya Saragih, Melda Jaya Novel Priatna Oce Datu Appulembang, Oce Datu Paladang, Karmila Kristina Panggabean, Meicky Shoreamanis Pantow, Edsel Yubil Pardamean Sinaga, Darma Roh Pitaya Rahmadi Priyanti, Neng Purba, Friska Juliana Purba, Joy Anwar Putri S, Margaretha Ivana R. H. Yanti Silitonga R. H. Yanti Silitonga Rizky Stevania Sihotang Robert Harry Soesanto Robert Harry Soesanto Robert Harry Soesanto Robert Harry Soesanto Rosarian, Ananda Wini Saragih, Melda J. Siahaan, Meiva Marthaulina Lestari Siane Indriani, Siane Sianturi, Evi Yunita Sianturi, Vera Nengsih Silalahi, R. Indah Silitonga, R. H. Yanti Sitinjak, Debora Suryani Soesanto, Robert Harry Tamba, Kimura Patar Tanti Listiani Tanti Listiani, Tanti Turmudi Widiatmoko, Teza Friensi Willy Ruben Sihombing Winardi, Yonathan Windi Kristiato Yohanis Bell Yanti Yanti Yanti Yanti Yanti Yaya S. Kusumah

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