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Rahmawati Rahmawati
Pendidikan Kimia, FKIP, University of Mataram
Education

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VALIDITAS DAN KEPRAKTISAN E-MAJALAH KIMIA MATERI ASAM BASA Baiq Ro'yatul Aeni; Mukhtar Haris; Rahmawati Rahmawati
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.v9i1.9730

Abstract

This study aims to determine the validity and practicality of a chemistry magazine on acid-base material. The study uses the Research and Development (R&D) method with the 4D development model (Define, Design, Development, and Disseminate). The define stage aims to determine the scope of the magazine development. The next step is to create an initial design for the chemistry magazine. The development stage aims to build the chemistry magazine, and the final step is to distribute it. The trial was conducted with 24 students from class XII MIPA-1 at SMAN 1 Suralaga. The results of the study showed that the validity value obtained from three validators using the Aiken's formula was 0.85 with a very valid category and a reliability value of 0.93 with a very high category. The level of practicality was measured through a student response questionnaire to the chemistry magazine. The analysis of the practicality data from student responses to the chemistry magazine yielded an average practicality score of 84%, placing it in the very practical category, indicating that students responded well to the developed chemistry magazine on acid-base material. Based on the data, the developed chemistry magazine on acid-base material is feasible and practical for use as reading material in the learning process.
PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATERI ASAM BASA KELAS XI Komang Nonik Sintha Komang; Syarifa Wahidah Al Idrus; Rahmawati Rahmawati
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.v9i1.11623

Abstract

This study aims to determine the effect of implementing the Problem-Based Learning model on students’ learning outcomes in acid-base material for class XI. The type of quasi-experimental research is a pretest-posttest control group design. The population comprised 127 students, with purposive sampling: class XI Mipa 1 as the experimental class (32 students) and XI MIPA 3 as the control class (30 students). Class determination was based on certain considerations and based on suggestions from chemistry subject teachers. Data collection techniques used test and interview instruments. The average pretest score of the control class was 35.33, while the experimental class was 43.13, and the average posttest score of the control class was 58.83, and the experimental class was 82.03. The results showed that the average N-gain score of the experimental class was 0.7 with a high category and the control class was 0.4 with a medium category. The t-test results yielded a t-statistic of 9.033 and a t-table value of 1.675 at df = 60 and a 5% significance level; therefore, the t-statistic is greater than the t-table value. This means there is a significant difference in value between the experimental and control classes. So, if H0 is rejected and Ha is accepted, then the use of the Problem-Based Learning model influences student learning outcomes in the acid-base material for class XI.
Co-Authors Baiq Ro'yatul Aeni Komang Nonik Sintha Komang Mukhtar Haris Syarifa Wahidah Al Idrus