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All Journal Chemistry Education Practice
Ermia Hidayanti
Pendidikan Kimia, Universitas Mataram
Education

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Pengaruh Model Contextual Teaching and Learning (CTL) Terhadap Literasi Kimia Peserta Didik Pada Materi Kesetimbangan Kimia Baiq Viona Olganita Sugondo; Yayuk Andayani; Ermia Hidayanti
Chemistry Education Practice Vol. 9 No. 1 (2026): Edisi Mei
Publisher : FKIP University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/cep.v9i1.10830

Abstract

This study aims to determine the effect of the Contextual Teaching and Learning (CTL) model on students’ chemistry literacy regarding chemical equilibrium. The study employed a quantitative approach with a quasi-experimental design in the form of a pretest-posttest control group design. The research sample consisted of 11th-grade students at SMAN 1 Pujut selected through cluster random sampling, with class XI F1 serving as the control group and class XI F2 as the experimental group receiving CTL-based instruction. The instrument used was a two-tier multiple-choice chemistry literacy test covering scientific and chemical content knowledge as well as higher-order learning skills. The content validity of the instrument was tested using Aiken’s V index, yielding a value of 0.88, indicating that the instrument falls within the valid category. The reliability of the instrument was tested using Cronbach’s Alpha coefficient, yielding a value of 0.74, indicating that the instrument has a high level of reliability and is therefore suitable for use in this study. The ANCOVA test results showed that the CTL model had a significant effect on students' chemical literacy (p=0.000<0.05) with a contribution of 29.7%. In the content aspect, the experimental class obtained 81%, higher than the control class at 72.5%. In the aspect of higher-order learning abilities, the experimental class reached 46.5%, while the control class only 15%. Overall, the chemical literacy of the experimental class was in the moderate category (64%), while the control class was in the low category (43.75%). This indicates that the CTL model is effective in improving chemical literacy because contextual learning helps students understand the concept of chemical equilibrium in a more meaningful and applicable way.
PENGEMBANGAN E-MAJALAH KIMIA BERBANTUAN KIMIA KOMPUTASI: STUDI INHIBITOR KOROSI MINYAK PALA (MYRISTICA FRAGRANS) PADA TEMBAGA Gesti Maharani; Saprizal Hadisaputra; Ermia Hidayanti
Chemistry Education Practice Vol. 9 No. 1 (2026): Edisi Mei
Publisher : FKIP University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/cep.v9i1.12234

Abstract

This study aims to develop a chemistry e-magazine, assisted by computational chemistry, as a learning supplement for redox reaction material and to determine its validity based on expert assessment. This study uses a mixed-methods approach that combines qualitative data (interviews with teachers and students, descriptions of the development process, and validator input) and quantitative data (student needs questionnaires and Aiken's V index). The development design uses the 4D model (define, design, develop, disseminate), limited to the development stage. The developed e-magazine contains redox reaction material contextualized with the phenomenon of copper corrosion, a study of nutmeg (Myristica fragrans) as a green corrosion inhibitor, DFT-based computational chemistry data (HOMO, LUMO, and energy gap parameters), as well as adsorption values from Monte Carlo simulations on the Cu(111) surface Validation was carried out by three experts using an assessment sheet analyzed with Aiken's V index. The results showed an average V value of 0.84 (very valid), with coverage of graphics (0.85), content feasibility (0.82), presentation feasibility (0.89), and language (0.87). The e-magazine was deemed suitable for use as a supplementary learning resource for chemistry on redox reactions.
Co-Authors Baiq Viona Olganita Sugondo Gesti Maharani Saprizal Hadisaputra Yayuk Andayani