Jurnal Serunai Matematika

DESAIN PENELITIAN QUASI EKSPERIMEN DALAM PENELITIAN PENDIDIKAN: KAJIAN PUSTAKA

Lilis Saputri, Mardiati Mardiati — Tue, 11 Nov 2025 00:00:00 +0700

The quasi-experimental research design is widely used in the field of education, especially when researchers are unable to fully randomize subjects. This article aims to examine and analyze the quasi-experimental research design within the context of education. The quasi-experimental design is a method frequently employed to evaluate the effectiveness of educational interventions when randomization is not feasible. Through this literature review, we identify various approaches and techniques used in quasi-experimental research, as well as the challenges and advantages faced by researchers. Additionally, this study discusses the importance of internal and external validity in quasi-experimental designs and their implications for educational practice. The findings indicate that although this design has limitations, it remains a valuable tool for generating empirical evidence that can support decision-making in education. It is hoped that these findings will provide insights for researchers and education practitioners in designing and implementing more effective research.

Ethnomathematics: An Analysis of Students’ Mathematical Conceptual Understanding of Batak Toba Culture in Pythagorean Mathematics

Tue, 11 Nov 2025 00:00:00 +0700

ABSTRAK

Penelitian ini bertujuan untuk mendeskripsikan kemampuan pemahaman konsep matematika siswa pada materi Teorema Pythagoras melalui pendekatan etnomatematika berbasis budaya Batak Toba. Pendekatan ini diterapkan dengan memanfaatkan elemen arsitektur Rumah Bolon sebagai media kontekstual dalam pembelajaran. Jenis penelitian ini adalah deskriptif kuantitatif. Populasi yang digunakan peneliti adalah siswa SMPN 14 BINJAI dan sampel siswa kelas VIII 5, dengan menggunakan teknik purposive sampling. Teknik pengumpulan data berupa observasi dan tes untuk mengukur kemampuan pemahaman konsep. Hasil penelitian menunjukkan bahwa integrasi budaya lokal dalam pembelajaran matematika dapat meningkatkan pemahaman konsep siswa, yang ditunjukkan dengan dominasi kategori “baik”. Dengan demikian, etnomatematika berbasis budaya Rumah Bolon efektif diterapkan sebagai strategi kontekstual dalam pembelajaran matematika khususnya pada materi Teorema Pythagoras.

PENGEMBANGAN BAHAN AJAR MATERI BILANGAN BULAT BERBASIS PENDEKATAN MATEMATIKA REALISTIK TERHADAP PEMECAHAN MASALAH MATEMATIKA SISWA KELAS VII SMP ABDI MARYKE

Enny Susilawati Enny Susilawati — Tue, 11 Nov 2025 00:00:00 +0700

This study aims to determine the development process of teaching materials on integer topics based on the Realistic Mathematics Education (RME) approach to improve students’ mathematical problem-solving skills that are valid, practical, and effective for seventh-grade students at SMP Abdi Maryke. This research employs the Research and Development (R&D) method using the ADDIE model, which consists of several stages: Analysis, Design, Development, Implementation, and Evaluation. The product developed is a set of student worksheets (LKPD) on integer material based on the RME approach to enhance mathematical problem-solving skills. The subjects of the trial were 30 seventh-grade students of SMP Abdi Maryke. The validation results showed that the average score from material experts was 0.87, categorized as very valid, and from design experts was 79.17%, categorized as valid. Based on the results of validity, practicality, and effectiveness tests, the practicality aspect obtained from students’ responses showed an average percentage of 0,90%, and from teachers’ responses 84.4%, both categorized as good. These findings indicate that the developed teaching materials can be categorized as practical. Furthermore, the effectiveness test using the N-Gain analysis showed an increase in problem-solving ability of 80.65%, categorized as effective. Therefore, the teaching material in the form of LKPD based on the Realistic Mathematics Education approach developed in this study is declared valid, practical, and effective.

AN ANALYSIS OF JUNIOR HIGH SCHOOL STUDENTS’ CONCEPTUAL UNDERSTANDING IN PLANE GEOMETRY USING A MALAY DELI ETHNOMATHEMATICS-BASED WORKSHEET

Lia Rezika Agustia, Ika Laila, Ela Dinda Pratiwi, Nur Madinah, Nur Madinah — Tue, 11 Nov 2025 00:00:00 +0700

This study aims to analyze students' conceptual understanding in mathematics when working on worksheets related to two-dimensional shapes based on Deli Malay ethnomathematics. This is a quantitative study using a descriptive method. The research was conducted at MTs Aisyiyah Binjai with the population being all eighth-grade students. The sample was selected using simple random sampling, resulting in class VIII-A with 22 students as the research sample. The data collection technique used was a test, in the form of a worksheet containing two-dimensional shape materials integrated with Deli Malay ethnomathematics. The results of the analysis showed that the average percentage score of students’ conceptual understanding ability indicators was 65.77%, which falls into the “good” category. The highest percentage was found in the indicator of developing necessary or sufficient conditions of a concept, reaching 78.41%. This indicates that most students were able to understand and identify the conditions related to geometric concepts and could demonstrate the relationship between necessary and/or sufficient conditions in applying them to the given problems.