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Mukhtar Haris
Pendidikan Kimia, Universitas Mataram
Education

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Pengembangan LKPD Kimia Materi Asam Basa Berbasis Problem Based Learning untuk Menumbuhkan Pemahaman Konsep Siswa Khairi Alfiana; Mukhtar Haris; Sunniarti Ariani
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.v9i1.10759

Abstract

This study aims to test the level of validity and practicality of the Chemistry Student Worksheet on acid-base material based on problem-based learning to foster students' conceptual understanding. The research method used is Research and Development (R&D) with a 4D development model that includes the stages of define, design, development, and disseminate. The subjects of this trial were lecturers of Chemistry Education FKIP University of Mataram and chemistry teachers of SMAN 1 Labuhan Haji for the purposes of validating the worksheet and 66 students of grades XI Health I and XI Health II for the purposes of testing the practicality of the worksheet. The data collection technique used was a questionnaire. The data analysis technique used the Aiken's V formula and the percentage of practicality. The results showed that the Chemistry Student Worksheet on acid-base material based on problem-based learning to foster students' conceptual understanding that had been developed by this researcher obtained an average validity of 0.89 in the very valid category and an average practicality value of 83% in the very practical category. Thus, it can be concluded that the chemistry student worksheet (LKPD) for acid-base matterl based on Problem Based Learning is suitable for use as teaching material to help foster students' conceptual understanding and support an active and meaningful learning process.
Pemahaman Konsep Kimia Asam Basa Siswa Kelas XI SMAN 7 Mataram Menggunakan Instrumen FTMC Muliana Lutfiatussholihah; Mukhtar Haris; Dodiy Firmansyah
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.v9i1.11021

Abstract

This study aims to determine and explain the understanding of acid-base chemistry concepts among 11th grade students at SMAN 7 Mataram. The type of research used is quantitative descriptive. The study was conducted in classes XI A3 and XI B1 with a total of 69 students, or 25% of the population of 273 students. Data were collected using a four-tier multiple-choice (FTMC) test instrument consisting of 17 valid questions. The results of this study indicate that the level of understanding of acid-base chemistry concepts among 11th grade students at SMAN 7 Mataram is 57.80%, which is classified as moderate, with a distribution of concept understanding as follows: understanding the concept (39.56%), misconceptions (36.91%), and not understanding the concept (23.53%) in the low category. The level of understanding of acid-base chemistry concepts among students in grades XI A3 and XI B1 was 61.27% and 54.01%, respectively, which is classified as moderate. The highest category of concept understanding among students in class XI A3 was that quite a lot of students understood the concept (49.07%) in the material on pH calculation of solutions, quite a lot of students had misconceptions (45.83%) in the material on acid-base strength, and a few students did not understand the concept (29.17%) in the material on acid-base strength. Meanwhile, the highest category of concept understanding among students in class XI B1 was that few students understood the concept (38.64%) in the material on acid-base indicators, quite a few students had misconceptions (45.46%) in the material on pH calculation of solutions, and few students did not understand the concept (31.82%) in the material on acid-base strength.
Pengembangan Buku Saku Kimia Materi Stoikiometri Aida Fitri Isnaini; Mukhtar Haris; Dodiy Firmansyah
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

Abstract

This study was motivated by students' difficulties in understanding stoichiometry material, which is abstract and involves many calculations, thus requiring practical, concise, and easy-to-use learning media. This study aims to test the validity, reliability, and practicality of the developed chemistry pocketbook on stoichiometry material. The research method used is Research and Development (R&D) with a 4D development model that includes the stages of define, design, develop, and disseminate. The subjects of this study consisted of chemistry education lecturers at FKIP University of Mataram, and chemistry teachers from SMAN 1 Labuapi for the purposes of validating the pocketbook and 18 students of class XI A of SMAN 1 Labuapi for the purposes of testing the practicality of the pocketbook. The data collection technique used was a questionnaire. The data analysis technique used the Aiken's V formula to calculate expert validation, the Pearson Product Moment formula to calculate empirical validation, Percentage Agreement to measure the reliability of the pocketbook and Cronbach's Alpha to measure the reliability of the practicality, and a practicality percentage analysis to assess students' responses to the pocketbook. The results of the study showed that the expert validity value was in the valid category (V = 0.74), the reliability of pocketbook  was 97% in the excellent category,  and the practicality of the pocketbook received an average of 88% with a very practical category. Thus, it can be concluded that the developed chemistry pocketbook on stoichiometry material is suitable for use as a learning media that can help students understand the basic concepts of stoichiometry more easily, interestingly, and efficiently.
Co-Authors Aida Fitri Isnaini Dodiy Firmansyah Khairi Alfiana Muliana Lutfiatussholihah Sunniarti Ariani