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Imajiner: Jurnal Matematika dan Pendidikan Matematika
Published by Universitas PGRI Semarang
ISSN : -     EISSN : 26853892     DOI : -
Core Subject : Education,
Education Languange, Linguistic, Communication & Media Mathematics Other
Imajiner: Jurnal Matematika dan Pendidikan Matematika memiliki fokus utama pada pengembangan ilmu di ranah matematika dan pendidikan. Lingkup dari fokus utama tersebut meliputi pendidikan dan terapan.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 480 Documents
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Analisis Kesulitan Siswa SMP dalam Memecahkan Masalah Statistika Berdasarkan Tahapan Polya Nursyahidah, Farida; Wardono, Wardono; Mariani, Scolastika; Wijayanti, Kristina
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27503

Abstract

Mathematical problem-solving skills are essential competencies in 21st-century education, particularly in statistics, where students must interpret data, analyze variability, and make informed decisions. However, many students experience significant difficulties when solving statistical problems. This study aims to analyze students' difficulties in solving statistical problems based on Polya's four stages of problem-solving: understanding the problem, developing a plan, implementing the plan, and looking back. This study uses a descriptive qualitative approach with 70 junior high school students in Semarang as subjects selected using a purposive sampling technique. Data were collected through written tests and semi-structured interviews. The findings revealed that students experienced difficulties in solving statistical problems based on Polya's stages were 45% of students were unable to complete the understanding stage, especially in identifying known information and organizing important information needed; 55% of students had difficulties at the planning stage, especially in selecting appropriate statistical procedures; 61% of students still had difficulties at the implementing stage of the plan; and 66% of students still had difficulties at the re-examination stage. This study provides implications for the development of integrated learning designs with real-world contexts and technology that emphasize structured problem-solving processes, thereby improving students' problem-solving abilities.
Efektivitas Tipe Student Teams Achievement Devisions Terhadap Pemahaman Konsep dan Kemampuan Berpikir Tingkat Tinggi Dalam Pembelajaran Sistem Persamaan Linier Tiga Variabel Kelas X SMK Swasta Parulian 1 Medan T. A. 2025/2026 sihotang, maria; Tambunan, Hardi; Hutauruk, Agusmanto J.B
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27472

Abstract

This study aims to determine the effectiveness of the Student Teams Achievement Divisions (STAD) method on conceptual understanding and higher-order thinking skills in the teaching of systems of linear equations with three variables for 10th-grade students at Parulian 1 Private Vocational High School, Medan, Academic Year 2025/2026. The study population consists of all 10th-grade students, and the sample comprises 60 10th-grade students. The sampling technique used was Purposive Random Sampling. The instruments used were tests, questionnaires, and observations. The research results, as seen from the indicators of learning effectiveness, were met: the learning structure was in the “good” category, teacher communication was in the “good” category, student response was in the “good” category, student activity was in the “good” category, and learning achievement was in the “achieved” category. The research results indicate that the Student Teams Achievement Divisions (STAD) learning method is effective in enhancing conceptual understanding and higher-order thinking skills.
Pemodelan Faktor-Faktor Kemiskinan di Indonesia Menggunakan Pendekatan Regresi LASSO febriani, widya
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27085

Abstract

In September 2024, the percentage of poor people in Indonesia reached 8.57 percent. This figure shows a decrease of 0.46 percentage points compared to March 2024. However, this poverty rate is still far from the national target. This study aims to analyze the factors that influence the percentage of poor people (P0) in order to provide a reference for the government to optimize policies on the dominant factors that have a strong impact on the percentage of poor people (P0). The research method uses LASSO regression due to the high multicollinearity problem in the data used. The analysis results show that the poverty depth variable (P1) and poverty severity variable (P2) have a dominant influence on the percentage of poor people (P0). The coefficient of determination value of 95% on the training data and 96% on the testing data indicates that the model has a very good ability to explain the percentage of poor people (P0).
Model Matematis dan Analisis Statistik Indeks Efisiensi Investasi Pariwisata (T-CLEI) Musafa, Musafa; Purwanda, Eka
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27460

Abstract

This study develops a mathematical and statistical framework for analyzing tourism investment efficiency through the Tourism Capital–Leverage Efficiency Index (T-CLEI). The model is formulated as a fractional optimization problem using a Cobb-Douglas profit function and analyzed via differential calculus, Hessian matrix analysis, and logarithmic transformation. Existence and uniqueness of the optimal solution are rigorously proven using the Extreme Value Theorem and concavity analysis. A statistical framework applying the Delta Method provides first-order approximations for the expectation and variance of T-CLEI, enabling confidence interval construction. The central theorem establishes that the optimal solution is unique when the sum of output elasticities satisfies β + γ  1. The model contributes for tourism investment efficiency analysis with potential for empirical validation on panel data.
Pengembangan Media Pembelajaran Berbasis Etnomatematika dalam Tradisi Nyadran pada Materi Bangun Ruang Sisi Lengkung untuk Meningkatkan Kemampuan Pemahaman Konsep Tiara, Ellsa Winda; Harun, Lukman; Aini, Aurora Nur
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27408

Abstract

This study aims to develop ethnomathematics-based learning media in the Nyadran tradition on the material of curved sided solids to improve students' conceptual understanding. This research is a research and development (RD) using the ADDIE model which includes the stages of Analysis, Design, Development, Implementation, and Evaluation. The limited trial subjects were 16 grade IX students. The research instruments included expert validation sheets to measure the validity of the media, student practicality questionnaires to measure the level of practicality of the media, and pre-test and post-test questions to measure the effectiveness of the media. The results showed that the developed learning media met the criteria of very valid with a percentage of 95% based on the assessment of media experts and 91% based on the assessment of material experts. The results of the practicality test obtained a percentage of 89% with a very practical category. Meanwhile, the results of the effectiveness test showed an N-Gain value of 0.5 which is in the medium category, this indicates an increase in students' conceptual understanding after using learning media. Based on these results, ethnomathematics-based learning media in the Nyadran tradition meets the criteria of being valid, practical, and effective in improving the ability to understand mathematical concepts.
Pengaruh Pendekatan Deep Learning Terhadap Kemampuan Pemecahan Masalah Matematika di Kelas XI SMK sitanggang, suryani; Naibaho, Tutiarny; Panjaitan, Simon M.
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27508

Abstract

This study was motivated by the low level of mathematical problem-solving skills among students at the Jambi Medan Private Vocational High School, which is attributed to the use of conventional teaching methods that do not sufficiently encourage active engagement and deep understanding. The objective of this study is to determine the influence and magnitude of the impact of the Deep Learning approach on the mathematical problem-solving skills of 11th-grade students in matrix material. The research method used is a Quasi-Experiment with a Post-test Only Control Group Design. The research population includes all 11th-grade students, with a sample selected through Cluster Random Sampling consisting of class XI MPLB 2 as the experimental class and XI MPLB 1 as the control class. Data analysis results showed that the average post-test score of the experimental class (72.62) was higher than that of the control class (46.40). Based on the t-test, a significance value of 0.000 0.05 was obtained, indicating a significant effect. The Effect Size test using Cohen’s D yielded a value of 3.29, which falls under the “very large” criterion. Thus, the Deep Learning approach is effective in improving students’ mathematical problem-solving skills at the Jambi Medan Private Vocational High School.
Pemodelan Spasial Tingkat Pengangguran Terbuka Kabupaten/Kota di Pulau Sumatera Menggunakan Pendekatan Geographically Weighted Panel Regression Rahmatullah, Figo; Syafriandi, Syafriandi; Fitri, Fadhilah
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27285

Abstract

This study aims to analyze the factors affecting the Open Unemployment Rate (OUR) at the regency/city level in Sumatra Island during the 2022–2024 period by considering spatial and temporal variations. The study employs panel data obtained from Statistics Indonesia, with the Open Unemployment Rate as the dependent variable and the Human Development Index, Mean Years of Schooling, Labor Force Participation Rate, and Gross Regional Domestic Product as independent variables. Panel data regression and Geographically Weighted Panel Regression (GWPR) are applied as analytical methods. The best panel regression model is selected using the Chow and Hausman tests, which indicate that the Fixed Effect Model is the most appropriate. The Breusch–Pagan test confirms the presence of spatial heterogeneity, justifying the use of the GWPR approach. The GWPR model with an adaptive bisquare kernel weighting function and optimal bandwidth successfully captures local variations in the relationship between explanatory variables and unemployment. The results reveal that Mean Years of Schooling and Gross Regional Domestic Product have a positive effect on the Open Unemployment Rate, while the Labor Force Participation Rate has a negative effect, with varying magnitudes across regions. The GWPR model outperforms the global panel regression, achieving a coefficient of determination of 96.8%. These findings highlight the importance of incorporating spatial approaches in formulating region-specific employment policies in Sumatra Island.
Efektivitas Pembelajaran Berbasis Web Wolfram Alpha Terhadap Kemampuan Pemecahan Masalah Matematis Siswa Pada Materi Fungsi Kuadrat Di Kelas X SMK Swasta Imelda Medan T.A 2025/2026 simangunsong, angginita; Hutauruk, Agusmanto JB; Simbolon, Lolyta Damora
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27483

Abstract

This study aims to determine the effectiveness of Wolfram Alpha-based web learning on students’ mathematical problem-solving skills in quadratic functions in Grade X at Imelda Private Vocational High School, Medan, Academic Year 2025/2026. This is a pre-test post-test control groupdesign study with the research population consisting of students in Grade X at Imelda Private Vocational High School, Medan. The research sample was selected using simple random sampling, resulting in the experimental class MP1 and the control class X-TKJ4. After being subjected to different treatments, the data were analyzed using inferential and descriptive analysis. The results of the analysis showed that the data on conceptual understanding met the prerequisite tests and were normally distributed, homogeneous, and linear. The t-test (α = 0.05) revealed a significant difference between the experimental and control classes. The results of the study showed that students’ mathematical problem-solving skills met the effectiveness indicators, leading to the conclusion that web-based learning is effective in enhancing students’ mathematical problem-solving skills.
Pengaruh Model Pembelajaran Problem Based Learning (PBL) Terhadap Kemampuan Pemecahan Masalah Matematis dan Motivasi Belajar Siswa pada Materi SPLTV di Kelas X Tambunan, Lisna; Simanjuntak, Ruth Mayasari; Suarman, Adi
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.27461

Abstract

This study aims to analyze the effect of the Problem Based Learning (PBL) learning model on mathematical problem-solving ability and student learning motivation on the Three Variable Linear Equation System (SPLTV) material in class X of SMK Swasta Budi Setia Sunggal Academic Year 2025/2026. This study uses a quantitative approach with a quasi-experimental study design in the form of a posttest-only control group design. The population of this study was all students of class X of SMK Swasta Budi Setia Sunggal consisting of 5 classes. The sample was determined using a purposive sampling technique. The research instruments used were tests, questionnaires, and observation sheets which were tested for validity, reliability, difficulty level, and discriminating power first. Post-test data were analyzed using normality tests, homogeneity tests, t-tests, and effect size. The results showed that the average post-test problem-solving ability in the experimental class reached 51.53 higher than the control class which reached 44.07. Meanwhile, the average post-test results of learning motivation in the experimental class reached 56.53, higher than the control class which reached 50.37. The results of the study showed that there was a significant influence between students' mathematical problem-solving abilities between the experimental class and the control class with a significant value of 0.001 0.05. In addition, there was no significant influence on students' learning motivation between the experimental class and the control class with a significant value of 0.191 0.05. Thus, it can be concluded that the use of the problem-based learning model has a significant effect on problem-solving abilities, while there is no significant influence on learning motivation.
Efektivitas Model Pembelajaran Creative Problem Solving Berbantuan Alat Peraga Manipulatif Terhadap Hasil Belajar Siswa SMP Virda, Diah Royanul; Rahmawati, Noviana Dini; Endahwuri, Dhian
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 3 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i3.22574

Abstract

The study was conducted to determine the effectiveness of the Creative Problem Solving learning model assisted by manipulative teaching aids on the learning outcomes of junior high school students. The research method used is quantitative with a research design in the form of a posttest-only control design. The study was conducted at SMP Negeri 1 Bangsri with sampling using the cluster random sampling technique on class VIII students. The sample consisted of two class, namely class VIII C as an experimental class tha would be given treatment in the form of the application of the Creative Problem Solving learning model assisted by manipulative teaching aids and class VIII D as a control class that would be given treatment in the form of the application of conventional learning models. Data collection techniques in the form of tests given after the treatment. Based on the effectiveness indicators, there are three assessments in this study, namely the difference in learning outcomes of the experimental class and the control class, a better comparative test, and the completeness of learning outcomes in the experimental class. The final data were analyzed using the Independent Sample T-test that there were difference in learning outcomes of students in the experimental class and the control class. Then for the comparative test of the experimental class and the control class, the One-Party T-test formula was used by showing that the experimental class was better than the control class. The learning outcomes of the experimental class reached an average value of 78 with 25 students achieving individual completeness and 5 students who did not complete it. So it can be said that the completeness of student learning in the experimental class classically can be said to be complete because it achieved completeness of 83%.

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