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Umar Kalmar Nizar
Universitas Negeri Padang
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Enhancing Students’ Achievement in Chemical Equilibrium Through a Scientific Literacy-Integrated 7E Learning Cycle E-Module Ahmad Maulana Ardi; Desy Kurniawati; Hardeli; Rahadian Zainul; Umar Kalmar Nizar
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.11211

Abstract

Scientific literacy is crucial in chemistry education, yet PISA results indicate that Indonesian students still struggle with abstract concepts like chemical equilibrium. To address this issue, this study developed a scientific literacy-integrated e-module based on the Learning Cycle 7E model to improve student learning outcomes. Using an educational design research approach with the Plomp model, the e-module’s validity, practicality, and effectiveness were evaluated. Validation by subject matter and media experts yielded high validity scores of 0.89 and 0.91, respectively. Practicality testing involving teachers and students resulted in high scores of 91.27% and 89.70%. Effectiveness analysis, measured using the N-Gain formula, showed a significant improvement in students' learning outcomes. These results indicate that the developed e-module is valid, practical, and effective in supporting the understanding of chemical equilibrium among senior high school students.
PEMANFAATAN MEDIA SOSIAL (INSTAGRAM, YOUTUBE, TIKTOK) UNTUK MENINGKATKAN KREATIVITAS DAN HASIL BELAJAR SISWA DALAM PEMBELAJARAN TEORI ASAM BASA DI SMA/MA Riga Oktry Silpa; Rahadian Zainul; Umar Kalmar Nizar; Desy Kurniawati
Jurnal Penelitian Pendidikan IPA Vol 12 No 2 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i2.14016

Abstract

Acid-base material in high school chemistry learning is often considered difficult because of its abstract nature, causing misconceptions and mere memorization in grade XI students. Social media (Instagram, YouTube, TikTok) with 139 million YouTube users and 127 million TikTok users in Indonesia has the potential as an interactive media, but has not been explored multi-platform inquiry-based. This study aims to develop an acid-base e-Module based on an integrated social media inquiry model to improve student creativity and learning outcomes. The quasi-experimental method with a Non-Equivalent Control Group Design was applied to two grade XI classes of MAN 6 Pasaman Barat. The experimental class used an e-Module with a social media link, while the conventional control. Data obtained from the validity and practicality test were analyzed using Aiken’s V formula and practicality percentages.  The validity test result showed a V value of 0.90, indicating a valid category. The analysis of the teacher practicality questionnaire showed an 86% score categorized as very practical, while the student practicality questionnaire showed an 84% score categorized as practical). The t-test yielded a sig (2-tailed) value of 0.02. Based on these results, it can be concluded that the developed e-module is valid, practical, and effective to improve students' creativity and learning outcomes.
Learning System with Digital Literacy Based on Guided Inquiry Integrated Flipped Classroom Using Discord Application on Colloid Silvi Handri; Mawardi Mawardi; Syamsi Aini; Umar Kalmar Nizar
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.4471

Abstract

This research aims to produce an integrated flipped classroom learning system based on guided inquiry using Discord application on colloid material for first year students using the Plomp development model developed by Tjeerd Plomp. The research instrument used a validation sheet filled in by 5 UNP chemistry lecturers, an interview sheet for assessment at the one-to-one evaluation stage which contained several questions with answers in the form of explanations from 3 students, a practicality sheet filled out by 9 students then content validity and constructs were analyzed using Aiken's V scale, and practicality was analyzed using practical percent. The results of the analysis of the content and construct validity data obtained were stated to be valid with a value of V = 0.84 and 0.91, as well as the results of the practicality test data analysis obtained a P value (%) of 93 in the very practical category. So that an integrated learning system is produced, flipped classroom based on guided inquiry using the Discord application on colloidal material which is used as an alternative method in the learning process in lectures.
Pengembangan E-Modul Sistem Koloid dengan Contextual Teaching and Learning (Ctl) Berorientasi Chemo-Entrepreneurship (Cep) untuk Meningkatkan Kemampuan Berpikir Kritis Peserta Didik Maifil Dwi Andrean; Rahadian Zainul; Umar Kalmar Nizar; Desy Kurniawati
Jurnal Penelitian Pendidikan IPA Vol 10 No 9 (2024): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i9.8546

Abstract

The high unemployment rate among high school graduates and the low critical thinking ability of high school students motivated the author to develop electronic teaching materials based on a contextual approach and oriented toward entrepreneurship. This study aims to determine the validity, practicality, and effectiveness of the e-Module on colloid system with Contextual Teaching and Learning (CTL) oriented toward Chemo-Entrepreneurship (CEP) to enhance students' critical thinking ability. The research method employed is Research and Development (R&D) using the Plomp model, which consists of the preliminary research phase, development or prototyping phase, and assessment phase. The research instruments used include validity questionnaires, practicality questionnaires and critical thinking ability test. The e-Module was validated by three lecturers from the Chemistry Department at UNP and two chemistry teachers from SMAN 6 Solok Selatan. Practicality testing was conducted with two chemistry teachers and 30 eleventh-grade students from SMAN 6 Solok Selatan. Data obtained from the validity and practicality tests were analyzed using Aiken’s V formula and practicality percentages. The validity test results showed a V value of 0.92, indicating a valid category. The analysis of the teacher practicality questionnaire showed an 86% score, categorized as very practical, while the student practicality questionnaire showed an 81% score, categorized as practical. The t-test yielded a sig (2-tailed) value of 0.026. Based on these results, it can be concluded that the developed e-Module is valid, practical, and effective in enhancing students' critical thinking skills.
Validity and Practicality of AI-Integrated Interactive Chemical Equilibrium E-Module Based on Structured Inquiry to Improve Students’ Critical Thinking Ability Adi Susanto; Minda Azhar; Yerimadesi; Umar Kalmar Nizar; Salsabilla Putri Serli
Jurnal Penelitian Pendidikan IPA Vol 12 No 4 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i4.14507

Abstract

Chemical equilibrium is one of the chemistry topics that is abstract and complex, often causing difficulties for learners in understanding the concepts and their applications. This study aimed to determine the validity and practicality level of an Artificial Intelligence (AI)-integrated interactive e-module on chemical equilibrium based on structured inquiry to improve students’ critical thinking ability. This study was a Research and Development (R&D) using the Plomp development model, which includes the Preliminary Research and Development or Prototyping Phase, without conducting the Assessment Phase. The results show that the developed e-module obtained a validation score of 0.92 (valid category) and a very high practicality level of 97%. The findings indicated that the AI-integrated, structured-inquiry-based interactive e-module on chemical equilibrium to improve Phase F students’ critical thinking ability is valid and practical.
WATERMELON PEEL EXTRACT AS GREEN CORROSION INHIBITOR FOR ST-37 CARBON STEEL IN SEAWATER Sri Teguh Priharti; Umar Kalmar Nizar; Rita Sundari; Sri Benti Etika; Budhi Oktavia; Ananda Putra; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 3 No. 3 (2021)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v3i3.13759

Abstract

Corrosion engineering has taken great interest in many industries that required high cost management to overcome the serious problems. This work has investigated the role of watermelon peel extract as green inhibitor to protect carbon steel in seawater. This investigation has studied the corrosion rate and inhibition efficiency applying weight loss method.  The laboratory result shows the optimum inhibition efficiency found to be 71.64% at 5% inhibitor concentration in 100 ml seawater at room temperature. The effects of temperature and immersion time on inhibition efficiency have also been examined.  This study has used Arrhenius equation based on activation energy to determine type of adsorption encountered with corrosion process. The result shows a chemical adsorption justified by its high adsorption heat and strengthened by FTIR and UV-Vis examinations. The phytochemical examination of watermelon peel extract gives positive response to flavonoid, alkaloid, and saponin. The finding is useful for many industries encountered with carbon steel corrosion in corrosive medium using green inhibitor.   
Co-Authors Adi Susanto Ahmad Maulana Ardi Ananda Putra Aroma Karmila Budhi Oktavia Delfitri Delfitri Desy Kurniawati Edi Nasra Ellizar ellizar Fajriah Azra Fauzan Yan Hawari Fauzana Gazali Fazhira Hanifah Geita Yulyan Firel Habibur Rahman Dafnaz Hardeli Hardeli Hardeli Hary Sanjaya Indang Dewata Isnaeni Isnaeni Lubis, Amalia Putri Maifil Dwi Andrean Mawardi Mawardi Minda Azhar Muhammad Hiknul Ikhsan Mulia, Melindra Nadia Nadia Naka Yura Nesya Febi Utami Niza Lian Pernadi Norma Wahyunita Oktavia Wulandari Rahadian Zainul Rida Rida Riga Oktry Silpa Rini Anggraini Risya Yelfika Safira Wulandari Salsabilla Putri Serli Septian Budiman Silvi Handri Sri Benti Etika Sri Teguh Priharti Sundari, Rita Suryelita . Syamsi Aini Syilla Nurvidayah Trisna Kumala Sari Vionisa Vionisa Wini Andriani Yerimadesi