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All Journal JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi
Verminus, Verminus
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Computer Science & IT Mathematics

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THE RELATIONSHIP OF SELF-CONFIDENCE WITH THE MATHEMATICAL PROBLEM-SOLVING ABILITY OF JUNIOR HIGH SCHOOL STUDENTS Verminus, Verminus; Rifat, Mohamad; Nursangaji, Asep
JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Vol 11, No 1 (2025)
Publisher : Universitas Bhinneka PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jp2m.v11i1.6986

Abstract

The purpose of this study is to describe the relationship between self-confidence and mathematical problem-solving ability in finding solutions to linear equations among junior high school students. This study utilizes a qualitative approach with a correlational design. The subjects of this study are the 32 students of class VIII D at SMP Negeri 12 Pontianak. The instruments are used including a self-confidence questionnaire and a test on the ability to solve problems related to linear equations. Data analysis employs the Pearson Product Moment correlation. The data shows that the students of class VIII D have a good level of self-confidence in learning mathematics. The majority of these students also possess good mathematical problem-solving abilities. Based on the calculation of the Pearson Product Moment correlation, the obtained correlation coefficient (r-value) between self-confidence and mathematical problem-solving ability for the students of class VIII D at SMP Negeri 12 Pontianak is 0.366, indicating a low correlation. However, there is a positive and statistically significant relationship between self-confidence and mathematical problem-solving ability, implying that an increase in self-confidence tends to correspond with an improvement in students' problem-solving skills. 
The Effect of PBL Integrated Education for Sustainable Development on Students' Mathematical Communication and Problem Solving Skills Puput, Puput; Yani T, Ahmad; Siregar, Nurfadilah; Verminus, Verminus
Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Volume 14 Issue 1 April 2026
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/euler.v14i1.37346

Abstract

This research adopted a pretest–posttest control group experimental design. The primary objective was to investigate the impact of implementing Problem-Based Learning (PBL) integrated with the Education for Sustainable Development (ESD) approach on students’ mathematical problem-solving abilities and mathematical communication skills within the context of matrix learning. The population consisted of all 11th-grade students at SMAN 8 Pontianak (N=280), with two classes selected through probability sampling as the experimental and control groups. Data were collected using essay tests, observations, and documentation, then analyzed using independent samples t-tests, Mann-Whitney tests, and effect size analyses. The findings indicated statistically significant differences between the experimental and control groups (p0.05). Specifically, the experimental group achieved a mean post-test score 20.21% higher than the control group in problem-solving and 36.41% higher in mathematical communication. Strong effect sizes (d=1.84 and r=1.34) further demonstrate that ESD-oriented PBL substantially improved students’ competencies compared to conventional methods.
Co-Authors Ahmad Yani T Asep Nursangaji mohamad rifat Nurfadilah Siregar Puput, Puput