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All Journal Phenomenon : Jurnal Pendidikan MIPA Jurnal Kimia Riset Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Global Research Education
Hardeli
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Mathematics Physics Other

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Pengembangan LKPD Ikatan Kimia Berbasis Contextual Teaching and Learning untuk Fase F SMA/MA. Putri Rahayu, Nabila; Hardeli
Journal of Global Research Education Vol. 2 No. 1 (2024)
Publisher : Akademi Akuntansi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62194/25cd0502

Abstract

Tujuan dari penelitian ini adalah mengembangkan LKPD berbasis Contextual Teaching and Learning pada materi ikatan kimia yang valid dan praktis. Jenis penelitian Educational Design Research (EDR) dengan model pengembangan plomp digunakan dalam penelitian ini. Instrumen pengumpulan data mengguanakn lembar validasi dan lembar praktikalitas. Hasil penelitian pada uji validitas LKPD ikatan kimia berbasis contectual teaching and learning untuk fase F SMA/MA yang dikembangkan diperoleh rata-rata indeks Aiken’s V sebesar 0,91 berada pada kategori valid. Hasil uji praktikalitas guru untuk LKPD yang dikembangkan diperoleh persentase sebesar 94% dengan kategori sangat praktis. LKPD yang dikembangkan memperoleh nilai persentase praktikalitas sebesar 93% dengan kategori sangat praktis.
Tannin-Based Natural Dye for DSSC: Polymerization Strategies to Maximize Efficiency Hardeli; Ade Putri, Annisa; Gusmar Lina, Resi; Feronika, Widi; permatasari, Putri
Jurnal Kimia Riset Vol. 10 No. 1 (2025): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v10i1.70387

Abstract

Dye-sensitised solar cells (DSSCs) use dyes to absorb sunlight. Tannin is an eco-friendly natural dye alternative. However, the efficiency of tannin-based DSSCs is still low due to the limited number of conjugated double bonds. This study aims to improve the efficiency of DSSCs by polymerising tannin in two steps: Formaldehyde condensation under acidic conditions and glutaraldehyde crosslinking in alkaline medium. Parameter variations included initiator concentration (KOH vs. NaOH), crosslinking agent volume, polymerization time and temperature, and tannin monomer concentration. Characterization by FTIR and UV-Vis showed an increase in light absorption after polymerisation. The best results were obtained at 120°C, 2% NaOH initiator, 2.5 mL glutaraldehyde volume and 90 min reaction time, with DSSC efficiency reaching 9.18%, a fourfold increase compared to pure tannin (2.18%). This study shows that tannin polymerization significantly improves the efficiency of DSSCs, so it has the potential to be developed as a more efficient natural dye for photovoltaic applications.
Integrated Green Chemistry Problem-Based Learning Module Development to Improve Science Process Skills Senior High School Students on Basic Chemicals Law Witri, Rahmi Eka; Hardeli; Kurniawati, Desy; Yerimadesi
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.4380

Abstract

The implementation of the independent curriculum at the senior high school level can be an opportunity for educators to develop alternative teaching materials that according to the latest curriculum standards. One alternative teaching material that can be used is the module. This study aims to develop a basic chemical law module based on Problem Based Learning integrated with green chemistry that is valid, practical and effective. This type of research is educational development research (educational design research) or known as EDR. The test subjects for this study were three chemistry lecturers, two chemistry teachers, and tenth grade students. The results of the study obtained a construct validity of 0.90 and a content validity of 0.91. The results of practicality tests by teachers and students are included in the very practical group with respective values of 0.88 and 0.84. The results of the t test on student learning outcomes showed that t-count (2.87) is bigger than t-table (1.67), and the value of science process skills in the experimental class was higher than the control class. Therefore, it can be said that the module based on problem base learning integrated with green chemistry on basic chemical law material is valid, practicable, and effective. Therefore, it can be said that the modules made are reliable and useful for use in the learning process.
Development of IPAS on Matter and its Changes Based on PjBL to Improve the Science Process Skills for Grade E Vocational High School Novianti, Exsa Rahmah; Hardeli
Jurnal Penelitian Pendidikan IPA Vol 10 No 7 (2024): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i7.7801

Abstract

The aim study to produce module of IPAS learning based on project based learning to improve the science process skill for grade E SMK and to determine level of validity practicality and effectiveness. The type of research used research and development (R&D). The development model used 4D models (define, design, development and dessiminate). The module of IPAS learning was validated by three chemistry lecturers from FMIPA UNP and two chemistry teachers from SMK Swasta Bakti Agro Mandiri and SMKN 1 Kempas. Determination of the practicality level of module IPAS learning by two chemistry teachers from SMK Swasta Bakti Agro Mandiri and SMKN 1 Kempas and 30 students of grade E SMK Swasta Bakti Agro Mandiri. The results of the practicality analysis based on teacher and student response questionnaires obtained Aiken scores of 0.97 and 0.93 respectively in the very high practicality category. Therefore, it can be said that the module based on project based learning to improve the science process skill for grade E SMK on matter and its change material is valid, practicable, and effective.
Development of Problem-Based Learning Student Worksheet Integrated with Ethnoscience on Acid-Base Material Marthin, Emmilya Febri; Hardeli; Oktavia, Budhi; Kurniawati, Desy
Jurnal Penelitian Pendidikan IPA Vol 10 No 7 (2024): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i7.7930

Abstract

This study aims to develop problem-based learning student worksheets integrated with ethnoscience on acid-base materials that are valid and practical. This research uses a development research method (Research and Development) with a 4-D model. The data of this study were collected through validity sheets completed by 4 validators, namely 2 chemistry lecturers and 2 chemistry teachers, and with a practicality questionnaire sheet completed by 2 chemistry teachers and by 35 students of SMAN 1 Batusangkar as respondents. Data were analyzed using quantitative descriptive method, using Aiken’s V. The result for content validity is 0.88 and construct validity is 0.90 with valid category. The result for teachers practicality is 0.95 and students practicality is 0.82 with practical category. Based on the results of the research that has been conducted, it can be concluded that the development of problem-based learning-based student worksheets integrated with ethnoscience on acid-base material is valid and practical.
Development of the Acid-Base Module Based on Problem Based Learning with Ethnochemisty to Improve Students Science Literacy Ability Pebrianti, Puji; Andromeda; Yerimadesi; Hardeli; Suryani, Okta
Jurnal Penelitian Pendidikan IPA Vol 10 No 8 (2024): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i8.8582

Abstract

This study aims to produce an acid-base module based on ethnochemical problem-based learning to improve students' scientific literacy skills, analyze the validity and practicality of the module and analyze the effectiveness of the acid-base module based on ethnochemical problem-based learning to improve students' scientific literacy skills. The type of research used is Research and Development (R&D) with a 4-D development model. The 4-D development model consists of 4 stages of development, namely define, design, develop and disseminate. The research instruments used are interview sheets, questionnaires, validation instruments, practicality instruments and effectiveness instruments. The validity test uses the Aiken's V formula. The results of the construct and content validity tests were 0.88 and 0.89 with a valid category. The results of the module practicality test carried out by teachers and students were 91.25% and 90.65% with a very practical category. The effectiveness test of the module was carried out using the N-Gain test and obtained a result of 0.71 in the high category. The results of the study indicate that a valid, practical and effective acid-base module based on ethnochemical problem-based learning has been obtained in improving students' scientific literacy skills.
Enhancing Students’ Achievement in Chemical Equilibrium Through a Scientific Literacy-Integrated 7E Learning Cycle E-Module Ardi, Ahmad Maulana; Kurniawati, Desy; Hardeli; Zainul, Rahadian; Nizar, Umar Kalmar
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.11211

Abstract

Scientific literacy is crucial in chemistry education, yet PISA results indicate that Indonesian students still struggle with abstract concepts like chemical equilibrium. To address this issue, this study developed a scientific literacy-integrated e-module based on the Learning Cycle 7E model to improve student learning outcomes. Using an educational design research approach with the Plomp model, the e-module’s validity, practicality, and effectiveness were evaluated. Validation by subject matter and media experts yielded high validity scores of 0.89 and 0.91, respectively. Practicality testing involving teachers and students resulted in high scores of 91.27% and 89.70%. Effectiveness analysis, measured using the N-Gain formula, showed a significant improvement in students' learning outcomes. These results indicate that the developed e-module is valid, practical, and effective in supporting the understanding of chemical equilibrium among senior high school students.
Development of Discovery Learning-Based E-Module with Video Demonstration to Improve Students’ Conceptual Understanding on Reaction Rate and Chemical Equilibrium Hardeli; Sakinah Alora, Bundani; Mulyani, Sri; permatasari, Putri
Phenomenon : Jurnal Pendidikan MIPA Vol. 14 No. 2 (2024): Jurnal Pendidikan MIPA
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/phen.2024.14.2.25765

Abstract

Learning chemistry concepts such as reaction rate and chemical equilibrium often pose challenges for students due to their abstract nature and limited opportunities for laboratory practice. This research aims to determine the validity, practicality, and effectiveness of the discovery learning-based emodule with a video demonstration on high school students' reaction rate and chemical equilibrium subjects. The type of research carried out was education design research (EDR) with the Plomp development model. This research involved six chemistry lecturers of the Faculty of Mathematics and Natural Sciences and Faculty of Engineering Universitas Negeri Padang. Teachers and students at the high school level from several schools were also involved in this research. Questionnaires, observations, interviews, and post-test and pretest scores were used to retrieve data. Based on the results, it was known that the two e-modules were in the valid category with values of 0.866 and 0.892. Furthermore, both e-modules have practicality values of 0.85 and 0.84 from teachers, respectively, and 0.96 and 0.87 from students, putting them in the practical category. The effectiveness values of the two e-modules were 0.59 and 0.67, so they were categorized as quite effective. The effectiveness of the developed e-module was evaluated based on the improvement of students’ conceptual understanding in the cognitive domain.
Co-Authors Ade Putri, Annisa Andromeda Ardi, Ahmad Maulana Budhi Oktavia Desy Kurniawati Feronika, Widi Gusmar Lina, Resi Marthin, Emmilya Febri Nizar, Umar Kalmar Novianti, Exsa Rahmah Pebrianti, Puji Putri Permatasari, Putri Putri Rahayu, Nabila Rahadian Zainul Sakinah Alora, Bundani Sri Mulyani Suryani, Okta Wahyuni, Melysa Dwi Witri, Rahmi Eka Yerimadesi