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Aini, Nisa Qurrata
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Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science

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Development of electronic portfolios to assess concept mastery and creative thinking on project-based acid-based concepts Aini, Nisa Qurrata; Nahadi, Nahadi; Fatimah, Soja Siti
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65188

Abstract

The purpose of the study was to develop an electronic portfolio instrument to assess concept mastery and creative thinking on project-based acid-base materials. The research participants are class XI, who will study acid-base materials. This research uses the 4D Research and Development model which are carried out up to stage 3 (Define, Design, and Development). On the define stage, a literature study, a field survey, material analysis, indicator analysis, and task analysis were conducted. The design stage designed grids and assessment rubrics, the preparation tasks consisting of four: making papers, practicum reports, posters, and concept maps. The design stage compiled an electronic portfolio instrument. The developmental stage conducts quality tests: initial development test, expert validity test obtained a CVR value of 1.00, reliability test with inter-rater obtained a Cronbach Alpha value between 0.652 and 1.000. After the electronic portfolio instrument was valid and reliable, a limited trial was conducted with N-Gain scores of task 1, task 2, task 3, and task 4, respectively: 0.17 (low), 0.13 (low), 0.46 (medium), and 0.32 (medium). The overall average of the pretest and posttest N-Gain scores is 0.90, with a higher category. This electronic portfolio instrument based on Project-Based Learning (PjBL) is expected to help teachers assess tasks on concept mastery and students' creative thinking on acid-based materials.
The need analysis for computational chemistry based learning media atomic structure and chemical bonding basic chemistry courses Nugraha, Asep Wahyu; Sinaga, Marudut; Darmana, Ayi; Sutiani, Ani; Aini, Nisa Qurrata
Jurnal Pendidikan Kimia Vol. 16 No. 1 (2024): April
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i1.56258

Abstract

The aim of this research is to analyze students' needs for computational chemistry-based learning media on atomic structure and chemical bonding in the Basic Chemistry course. The population of this study were the first grade students of the Chemistry Department, FMIPA Unimed. The number of samples in this study was 93 students from three classes. The instruments used are multiple choice questions and questionnaires to determine mastery of atomic structure and chemical bonding. The research results show that the average score is 34.430 (poor category). The average score achieved in atomic structure material was 33.16 (very poor). The lowest score achieved in the atomic properties sub-material was 9.3. The average score achieved in chemical bonding material was 36.1 (very poor). The lowest score achieved in the properties of ionic compound sub-material was 17.5. The results of the questionnaire showed that the atomic structure material that students considered the most difficult was the wave mechanics atomic model at 72.233 (quite difficult), while for chemical bonding material it was the octet and duplet rule at 71.055 (quite difficult).
Co-Authors Asep Wahyu Nugraha Ayi Darmana, Ayi Marudut Sinaga Nahadi Soja Siti Fatimah Sutiani, Ani