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All Journal JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Penelitian Pendidikan IPA (JPPIPA)
Sadly, Deni
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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How to Develop Visual Representation Test Instruments on Optical Equipment Material for High School Students? Nurmahasih, Utari; Istiyono, Edi; Sadly, Deni; Warjo, Warjo
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v13i1.17155

Abstract

In physics learning, visual representation is an important tool for turning abstract concepts into more easily understood ones, especially topics about optical equipment. However, current teaching instruments are often less effective in providing adequate visualization. This research on the development of visual representation test instruments for senior high school or Islamic senior high school (SMA/MA) on optical device topic was carried out with the aims of 1) developing a visual representation test instrument on optical devices material, 2) determining the expert validity of the visual representation instrument on optical devices material, 3) determine the item validity and reliability of the visual representation instrument on optical devices material through limited trials, 4) determine the level of difficulty and differentiability of visual representation instruments on optical devices material. This research design was the Research and Development procedure from Borg and Gall, which was modified up to the product trial stage. Data was collected from the expert validation and product trials and then analyzed using a quantitative description. Eight validators validated the visual representation instrument. The research subjects were 30 eleventh-grade science students. The results of the analysis concluded that the product was suitable for use by teachers in assessing student representation. Therefore, the visual representation test instrument for optical devices material is suitable for teachers. Through this instrument, it is hoped that we can see the ability of students' representation instruments in learning optics. 
Development of a Practicum Guide on Static Electricity Using a Van de Graaff Generator for Students Sadly, Deni; Akhsan, Hamdi
Jurnal Penelitian Pendidikan IPA Vol 9 No 6 (2023): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i6.2788

Abstract

This research aims to develop practical guidelines for the Van de Graaff Generator on Static Electricity for Students that are valid and practical. This research uses research and development research methods with the Rowntree development model. The Rowntree development model is product-focused, consisting of three stages: planning, development, and evaluation. At the evaluation stage using, Tessmer's formative evaluation, namely self-evaluation, expert review, one-to-one evaluation, and small group evaluation. This research collected data in two ways: walkthrough and student response questionnaires. The results of the two methods are then analyzed by finding the average percentage value and converted according to the predetermined category. Based on the results of the expert review, it was found that the average overall aspect was 90.80% which was categorized as very valid. At the one-to-one evaluation stage, an assessment of student responsiveness was obtained of 81.67%, categorized as practical. Furthermore, in the small group evaluation stage, the results of student responses were obtained by 87% in the very practical category. Thus, based on the results of the research, the Van de Graaff Generator (GVG) practicum guide on Static Electricity for Physics Education Students is very valid and practical.
Co-Authors Edi Istiyono Hamdi Akhsan Nurmahasih, Utari Warjo, Warjo