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All Journal Jurnal Gantang Jurnal Pengembangan Pembelajaran Matematika
Harahap, Dwi Fajri Hasanah
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Education Mathematics

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Eksplorasi Etnomatematika Pada K Eksplorasi Etnomatematika Pada Kelong Apung di Malang Rapat: Etnomatematika pada Kelong Apung Harahap, Dwi Fajri Hasanah; Febrian, Febrian; Nurizati, Nurizati; Sanadia, Sanadia; Adelia, Marvina; Ambarita, Nova Indah; Candraningtyas, Rara; Rahmawati, Kurnia
Jurnal Gantang Vol 8 No 2 (2023): Jurnal Gantang
Publisher : Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jg.v8i2.6662

Abstract

Mathematics taught in schools is often associated with the material needs of students; mathematics not only does not have to be understood in the school environment but also understood in other surrounding environments, such as culture and others. This study aimed to determine the ethnomathematics of Malay traditional floating kelong in Malang Rapat, Bintan Regency. The research method used is a descriptive qualitative method with an ethnomathematical approach. The research instruments used are observation sheets, interviews and documentation. Based on the research results presented, the author concluded, namely, the use of mathematical concepts in certain cultures and societies, such as the use of addition and subtraction in calculating the amount of wood used or the number of barrels used in floating kelongs. Making floating kelongs using basic mathematics, especially addition and subtraction operations, can be used to calculate the amount of wood used to construct floating kelongs and the number of barrels applied. Taxonomy is also applied to analyze and categorize certain elements in research, concerned with understanding how the components of floating kelong are classified or organized. The role of mathematics in identifying and calculating pesky components (materials that bring good luck or maintain security) used in floating kelongs. Ethnomathematics can also involve understanding the cultural themes underlying the use of mathematics in everyday life, such as how mathematical concepts are integrated with cultural beliefs and practices in the construction of floating kelongs.
The effect of differentiated learning using geomath media on junior high school students’ mathematical concept understanding Harahap, Dwi Fajri Hasanah; Azmi, Roma Doni; Dwinata, Alona
Jurnal Pengembangan Pembelajaran Matematika (JPPM) Vol. 8 No. 1 (2026): Jurnal Pengembangan Pembelajaran Matematika: Volume 8 Nomor 1 February 2026
Publisher : Pusat Studi Pengembangan Pembelajaran Matematika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/jppm.2026.81.%p

Abstract

Understanding mathematical concepts (PKM) is an important thing that must be achieved by students to help them master the material more deeply, understand relationships between concepts, and prepare for more complex mathematical materials at the next level. Based on the findings from observations and interviews with mathematics teachers showed that students still lack understanding and apply mathematical concepts ineffectively. To overcome this problem, the researcher implemented differentiated learning with GeoMath media. The purpose of this research is to identify the effect of differentiated learning through the use of GeoMath media to enhance junior high school students’ understanding of mathematical concepts. The method was quasi-experimental with a quantitative approach. The research sample consisted of class IX.1 as the control group and class IX.3, which was assigned as the experimental group, selected through cluster sampling from all class IX students at SMP Negeri 1 Arse. The data collection was through a pretest and posttest, then analyzed using the independent sample t-test with a significance level of 5%. The results showed a significant value of 0,002. Since the test was a one-tailed test (right-tailed test), the sig. value =1/2 × 0,002 - 0,001, and since 0,001 <0,05, H0 is rejected and Ha is accepted, indicating a statistically significant difference between the posttest results of students in the experimental group and the control group. Thus, it can be concluded that the application of differentiated learning assisted by GeoMath media significantly improves students' understanding of mathematical concepts.
Co-Authors Adelia, Marvina Alona Dwinata Ambarita, Nova Indah Candraningtyas, Rara Fachry Abda El Rahman Kurnia Rahmawati, Kurnia Nurizati Nurizati Roma Doni Azmi Sanadia, Sanadia