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All Journal JCER (Journal of Chemistry Education Research) Science Education and Application Journal Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Jurna Beta Kimia Jurnal Pendidikan Impola
Harefa, Nelius
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Arts Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Social Sciences Other

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Persepsi Mahasiswa Terhadap Pemanfaatan Microsoft Teams Sebagai Platform Pembelajaran Kimia Pada Masa Pandemi Covid-19 Harefa, Nelius
Jurnal Beta Kimia Vol 1 No 2 (2021): Volume 1, Nomor 2: November 2021
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v1i2.5572

Abstract

Pandemi Covid-19 menstimulus terjadinya perubahan tata cara proses pembelajaran. Tidak diakomodasinya pembelajaran tatap muka, menstimulus munculnya inovasi pembelajaran berbasis digital. Salah satu inovasi tersebut yakni pemanfaatan Microsoft Teams sebagai platform pembelajaran kimia. Pada penelitian ini, dipaparkan persepsi mahasiswa terhadap platform tersebut yang ditinjau dari sisi aksesbilitas, easiness implementating, dan ketersediaan fitur. Sampel penelitian berjumlah 73 orang, yang masing-masing diberi angket persepsi dimana setiap angket terdiri dari 10 pernyataan dengan 5 opsi pilihan pada masing-masing kategori. Berdasarkan hasil penelitian, 93,15% mahasiswa beranggapan bahwa Microsoft Teams mudah diakses, 54,79% beranggapan mudah diimplementasi, dan 43,83% beranggapan bahwa fitur Microsoft Teams tersedia namun perlu updating. Data tersebut menunjukkan bahwa mayoritas mahasiswa mampu mengintegrasikan Microsoft Teams pada proses pembelajaran kimia.
A STUDENT PERCEPTIONS REGARDING THE UTILIZATION OF VIRTUAL LABORATORY TO INCREASE INTEREST IN LEARNING CHEMISTRY AT SMAN 3 MATARAM: - Simanjuntak, Familia Novita; Harefa, Nelius; Azzahra, St. Fatimah; Sumiyati, Sumiyati; Simatupang, Nova Irawati; Sormin, Elferida; Purba, Leony Sanga Lamsari
JCER (Journal of Chemistry Education Research) Vol. 8 No. 1 (2024): Volume 8 No. 1 June 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v8n1.p54-58

Abstract

The purpose of this study was to analyze students' perceptions regarding the use of VR-based virtual laboratories inincreasing students' interest in learning chemistry. The research method used is a simple survey method. The researchsample was students from SMAN 3 Mataram, totaling 51 people. Analysis of data from a simple survey using adescriptive quantitative method. The questionnaire instrument is an instrument that is used to collect data anddisseminate it online using the Google Form. The data obtained shows the usefulness, use, responses and advantagesand disadvantages of VR-based virtual laboratories. After conducting the survey, it turned out that the use of VRbasedvirtual laboratories received positive responses and perceptions from students.Key words: Virtual lab, Interests, Online learning
Analisis Kandungan Vitamin C Bahan Makanan dan Minuman dengan Metode Iodimetri Harefa, Nelius; Feronika, Nella; Kana, Angel Djara; Hutagalung, Romelia; Chaterine, Donna; Bela, Yongkifianus
Science Education and Application Journal Vol 2 No 1 (2020): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v2i1.194

Abstract

Vitamin C is an essential compound for human. The sources of Vitamin C are very abundant both natural and artificial. In this study, analyzed levels of Vitamin C in natural foods and artificial drinks that can be consumed by humans. The analysis aims to provide information on Vitamin C levels from these foodstuffs and beverages, so that humans can predict the content of Vitamin C that must be consumed or consumed daily. Many methods can be used to determine Vitamin C in a sample, the method used in determining Vitamin C in a research sample is the iodimetric method. Based on the analysis of research data, the Vitamin C level in sample A was 2.286 mg/g sample, the Vitamin C level in sample B was 2.204 mg/g sample, and the Vitamin C level in sample C was 0.044 mg/g sample. The data shows that humans need about 18 - 68 grams of sample A material per day to fulfill 40 - 90 mg of Vitamin C needed. Sample B material is needed around 20 - 70 grams to fulfill 40 - 90 mg of Vitamin C needed. And, the sample C material is needed around 56 - 106 grams per day to fulfill 40 - 90 mg of Vitamin C needed.
Persepsi Siswa terhadap Google Classroom sebagai LMS pada masa Pandemi Covid-19 Harefa, Nelius; Sumiyati, Sumiyati
Science Education and Application Journal Vol 2 No 2 (2020): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v2i2.270

Abstract

Pandemi Covid-19 berpengaruh terhadap aspek pendidikan, proses pembelajaran bergeser dari pembelajaran konvensional (tatap muka) di kelas menjadi pembelajaran online. Salah satu unsur penting dari penerapan pembelajaran online yakni ketersediaan LMS. Google classroom merupakan salah satu LMS yang dapat dimanfaatkan pada proses pembelajaran online. LMS ini didukung berbagai fitur yang dapat dielaborasi untuk mendukung proses pembelajaran. Pada penelitian ini, persepsi siswa dianalisis dan diinterpretasi terhadap pemanfaatan google classroom pada proses pembelajaran selama pandemi Covid-19. Data dikumpulkan dengan memberikan instrumen penelitian berupa angket yang terdiri dari 10 pernyataan dan dilengkapi dengan 5 opsi jawaban kepada masing-masing siswa. Analisis dan interpretasi menunjukkan bahwa 39,19% merasa sangat bersemangat dengan pengimplementasian google classroom pada proses pembelajaran selama pandemi Covid-19, 41,89% siswa merasa sangat senang pada proses pembelajaran terintegrasi google classroom, 47,30% siswa merasa senang akan perolehan nilai selama proses pembelajaran berbantukan google classroom, 41,89% siswa merasa tidak terbebani akan tugas yang diberikan oleh guru selama proses pembelajaran berbantukan google classroom, 51,35% merasa biasa saja dalam mengerjakan tugas mandiri yang diberikan melalui google classroom, 39,19% siswa merasa tertarik terhadap pengimplementasian google classroom sebagai LMS pada proses pembelajaran, 36,49% merasa antusias pada proses pembelajaran berbantukan google classroom, 40,54% merasa tertarik pada proses pembelajaran berbantukan google classroom, 56,76% siswa beranggapan bahwa pemanfaatan google classroom pada proses pembelajaran pada kategori mudah, dan 70,27% siswa memahami cara pengimplementasian google classroom pada proses pembelajaran setelah dijelaskan oleh guru.
Analisis Persepsi Mahasiswa terhadap Efektivitas Pembelajaran Kimia Secara Daring pada Masa Pandemi Covid 19 Heni, Astrina; Sormin, Elferida; Purba, Leony Sanga Lamsari; Harefa, Nelius
Jurnal Pendidikan Impola Vol. 2 No. 1 (2025): MARCH
Publisher : PT. Impola Toba Lendt

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70047/jpi.v2i1.148

Abstract

This study aims to determine students' perceptions of the effectiveness of online chemistry learning during the Covid-19 pandemic. The study population was all students of the Chemistry Education Study Program, Faculty of Teacher Training and Education, Indonesian Christian University. The research sample was 47 students of the Chemistry Education Study Program at Indonesian Christian University, selected using the saturated sampling technique. The instrument used was a closed questionnaire about the perceptions of Chemistry Education students towards online learning which was compiled using the Likert scale method, consisting of three indicators, namely, acceptance, understanding, and evaluation. The research data were analyzed using descriptive statistics. The results of the study showed that students' perceptions of online chemistry learning during the Covid-19 pandemic for the acceptance indicator were 75.38% in the good category, the understanding indicator was 72.19% in the good category, and the evaluation indicator was 70.26% in the good category. When generalized, students' perceptions of online chemistry learning averaged 72.61% in the good category. Thus, the implementation of online learning during the Covid 19 pandemic went well and students thought that the facilities provided could support learning well.
Students™ Imaginative Skills to Create a Simple Gamification on Chemistry Material Harefa, Nelius; Sumiyati, Sumiyati
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 6 No. 1 (2024): APRIL 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i1.57325

Abstract

The creativity dimension related to cognitive, affective, psychomotor and other skills aspects. The creativity dimension is closely related to learning outcomes and students' ability to be creative in producing relevant products. One important indicator of the creativity dimension is students' imagination skills. Through good imagination skills, students will be able to predict and create patterns in the content and context of learning material. In this research, an analysis of students' imagination skills will be carried out which consists of three indicators, namely playing with possibilities, making connections, and using intuition. The research was carried out using a classroom action research approach consisting of 3 cycles, where research data was collected by giving a questionnaire consisting of 4 statements for each indicator with 5 options for each research instrument. Apart from the questionnaire method, research data was collected through random interviews and structured observation. Based on data analysis, students' imagination skills were highest in the playing with possibilities indicator at 81.05 in cycle 3. Meanwhile, students' imagination skills were lowest in the using intuitions indicator at 35.75 in cycle 1. In general, simple gamification activities were able to increase students' imagination skills between 10% - 40%.
Chemistry Learning Innovation in Household Level Entrepreneurship Product Training for The Community of Tidung Island Simanjuntak, Familia Novita; Simatupang, Nova Irawati; Azzahra, St Fatimah; Sumiyati, Sumiyati; Harefa, Nelius; Sormin, Elferida; Purba, Leony Sanga Lamsari
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 6 No. 1 (2024): APRIL 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i1.57478

Abstract

This community service aims to provide support and training to PKK women on Tidung Island. Service implementation is carried out using presentations, interactive discussions, and direct practice to improve the village's capacity and creativity. The objectives to be achieved by this activity are to increase knowledge about the effects of careless disposal of used cooking oil waste and to improve skills in handling used cooking oil so that it is a valuable useful treatment. Used cooking oil is waste cooking oil that has been used many times and contains carcinogenic compounds that are difficult to decompose. Both of these properties are dangerous to health and the environment if used cooking oil is consumed and discharged into the environment without change. To achieve this goal, the method that will be used in this activity is to provide health education on the effects of careless disposal of used cooking oil waste and subsequent processing practices using cooking oil into candles. The outcome of undertaking this activity is an increased understanding of the impact of used cooking oil waste on health and the environment. In addition, you can also take advantage of used cooking oil scraps to make candles.
Inquisitive Ability on Chemistry Material Gamification with Project Based Learning Approach Tamansa, Santhya Anaomi; Harefa, Nelius; Tamba, Riris Marito
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 6 No. 1 (2024): APRIL 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i1.57561

Abstract

This study aims to evaluate the use of gamification in increasing students™ inquisitive ability on chemistry material with project based learning approach. In this research, an analysis of students' inquisitive ability will be carried out which consists of three indicators, namely wondering and questioning, exploring and investigating, and challenging assumption. The research was carried out using a classroom action research approach consisting of 3 cycles, where research data was collected by giving a questionnaire consisting of 4 statements for each indicator with 5 options for each research instrument. Apart from the questionnaire method, research data was collected through random interviews and structured observation. Based on data analysis, students' inquisitive ability was highest in the wondering and questioning indicator at 83.68 in cycle 3. Meanwhile, students' inquisitive ability was lowest in the challenging assumptions indicator at 41.25 in cycle 1. In general, gamification activities were able to increase students' inquisitive ability between 9% - 50%.
Co-Authors Azzahra, St. Fatimah Bela, Yongkifianus Chaterine, Donna Elferida Sormin Familia Novita Simanjuntak Feronika, Nella Heni, Astrina Hutagalung, Romelia Kana, Angel Djara Nova Irawati Simatupang Nova Irawati Simatupang, Nova Irawati Purba, Leony Sanga Lamsari St Fatimah Azzahra, St Fatimah SUMIYATI SUMIYATI Tamansa, Santhya Anaomi Tamba, Riris Marito