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All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) JURNAL PENDIDIKAN DAN ILMU FISIKA
Tantri Rahmayu
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Chemistry Education Physics

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Penerapan Model Problem Based Learning Berbantuan DeFT E-Worksheet untuk Meningkatkan Kemampuan Pemecahan Masalah pada Materi Fluida Statis Tantri Rahmayu; Muhamad Gina Nugraha; Muslim
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.2357

Abstract

The topic of static fluids requires students to understand concepts in the context of everyday phenomena. However, problem-solving skills in this subject remain a challenge because students tend to apply formulas directly without fully understanding the context of the problem. This situation highlights the need for active, context-based problem-solving learning and the support of targeted representations. Therefore, this study aims to analyze the application of the Problem-Based Learning (PBL) model, supported by Design, Function, and Task (DeFT) e-worksheets, in improving students’ problem-solving skills in static fluid mechanics. This study employed a pre-experimental design with a one-group pretest-posttest format. The research sample consisted of 33 11th-grade science students at a MAN in Bandung Regency, selected using convenience sampling. Research instruments included an observation sheet for instructional implementation, a problem-solving skills test, and a student response questionnaire. Data were analyzed using implementation percentages, N-Gain, the Wilcoxon test, Cohen’s d effect size, and descriptive percentage analysis. The results showed that the implementation of the PBL syntax achieved an average of 86.72%, falling into the “very good” category. Problem-solving skills improved, with an N-Gain of 0.39 in the “moderate” category. The Wilcoxon test showed that posttest scores were significantly higher than pretest scores (Z = -4.978; p < 0.001), with an effect size of 2.259 in the large category. Student responses fell into the “good” category across all ARCS dimensions. Thus, the implementation of the PBL model supplemented by DeFT e-worksheets demonstrated effectiveness in improving the problem-solving skills of the students in the study group, as evidenced by the increase in N-Gain, the results of the hypothesis testing, and the effect size. Future researchers are recommended to involve a control group and apply the model to broader samples or different physics topics to obtain stronger evidence regarding its effectiveness.
Penerapan Project-Based Learning melalui Pengembangan Alat Filter Udara Berbasis Karbon Aktif dan Arduino sebagai Solusi Masalah Lingkungan Iin Inayah; Tantri Rahmayu; Halwa Anisa Zaitun
Jurnal Pendidikan dan Ilmu Fisika Vol 6 No 1 (2026): Juni 2026
Publisher : Universitas Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52434/jpif.v6i1.44233

Abstract

Air pollution caused by cigarette smoke and vehicle emissions poses serious health risks and provides a meaningful context for project-based learning. This study aimed to describe the implementation of Project-Based Learning (PjBL) through the development of an activated carbon- and Arduino-based air filter and to examine its contribution to students' critical thinking and problem-solving skills. A qualitative descriptive case study was conducted following engineering-based PjBL stages, including problem identification, prototype construction, testing, redesign, and product presentation. Data were collected using PjBL implementation observation sheets, product quality assessment rubrics, and oral communication rubrics. Students developed a prototype incorporating activated carbon, an MQ-135 air quality sensor, a DC fan, and an Arduino Uno. Initial testing revealed limitations in sensor stability, filtration efficiency, and structural strength. These issues were addressed through iterative redesign by improving the filter material, reinforcing the frame, and adding a magnetic locking mechanism. The final prototype demonstrated improved performance, stability, and design quality. Descriptive statistics indicated that PjBL was effectively implemented and promoted students' critical thinking and problem-solving skills through authentic, context-based engineering experiences.
Co-Authors Halwa Anisa Zaitun Iin Inayah Muhamad Gina Nugraha Muslim