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All Journal Chemistry Education Practice
I Nyoman Loka
Pendidikan Kimia, Universitas Mataram
Education

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Pengembangan Tes Uraian Untuk Identifikasi Profil Keterampilan Berpikir Kritis Materi Ikatan Kimia Siswa Kelas XI SMAN 7 Mataram Nur Ismiyahyi; I Nyoman Loka; Muti’ah Muti’ah
Chemistry Education Practice Vol. 8 No. 2 (2025): Edisi November
Publisher : FKIP University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/cep.v8i2.9932

Abstract

This research is a type of Research and Development (R&D) with the 4D model (Define, Design, Develop, Disseminate) which aims to develop a description test instrumen to identify critical thinking skills of class XI students of SMAN 7 Mataram on chemical bonding material. The instrumen was developed by fulfilling the criteria of validity, reliability, level of difficulty, and distinguishing power. Validation was carried out by three experts, consisting of two Chemistry Education lecturers at Mataram University and one chemistry teacher at SMAN 7 Mataram. The results of content validity using Aiken's V with an average value of 0.82 which is classified as having a very high level of validity. Empirical validity states that all seven items are valid with the highest value reaching 0.83. The reliability test rcount of 0.813 is greater than the rtable indicates the item is reliable. The level of difficulty of the questions is in the medium category which ranges from 0.52-0.66. Differentiating power is in the sufficient to very good category ranging from 0.26-0.72. Students' critical thinking skills assessed using the developed instrumen were sufficient with an average value of 58.
Pengembangan Media Pembelajaran Kahoot Pada Materi Kimia Minyak Bumi Kelas XI di MA Darunnajah Duman Hidayatul Laelin; I Nyoman Loka; Burhanuddin Burhanuddin
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.v9i1.10909

Abstract

The aim of this research is to produce Kahoot learning media on petroleum material with minimum feasible criteria based on validity, practicality and effectiveness. This type of research uses research and development procedures. The development model used is the 4-D model developed by Thiagarajan et al (1974). In this research, the Kahoot learning media was developed, media validated by 3 people, namely 2 Chemistry Education lecturers and 1 chemistry subject teacher as well as all 23 class XI MIA students to test the practicality and effectiveness of the Kahoot media being developed. . The results of the validity test with Aiken's V show an average value of 0.83 with a very valid category, which means very feasible. The results of the practicality test using a Likert scale obtained an average value of 83.5%, which indicates a very practical category, which means very feasible. The results of the effectiveness test using the n-gain test obtained a percentage of 77% in the effective category, which means very feasible.
Pengembangan Petunjuk Praktikum Kimia Bahan Alam Tentang Ekstraksi dan Identifikasi Senyawa Flavonoid dari Brokoli dan Kale Wahida Shofyatun Nufusita; I Nyoman Loka; Yayuk Andayani
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.v9i1.11313

Abstract

This research aimed to produce a natural products chemistry laboratory guide and to determine the feasibility based on validity and practicalit. This research was an experimental samples used in this research were 50 g broccoli and 50 g of fresh kale leaves. The subjects as sources of validity and practicality data were two lectures as expert validators and 18 students of the Chemistry Education study Program in the seventh semester of the 2021/2022 academic year for the practicality test of the laboratory guide, who were determined using purposive sampling tehnique and whose data were collected using a questionnaire technique. The experimental data were analyze qualitatively and showed the presence of flavonoid compounds. The development dara of laboratory guide in the form of validity data were analyzed using the Aiken’s V formula and percent of agreement. From the analysis, an Aiken’s V value of 0.92 was obtained, which is included in the very valid category. In additional, a percent of agreement value of 0.93 indicates a very high level of agreement among the raters. Based on the practicality test result, a value of P= 90% was obtained, which indicates that the laboratory guide is very practical. Based on these result, it can be concluded that the developed laboratory guide is caterorized as very feasible and very practical.
Co-Authors Burhanuddin Burhanuddin Hidayatul Laelin Muti’ah Muti’ah Nur Ismiyahyi Wahida Shofyatun Nufusita Yayuk Andayani