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All Journal Jurnal Pendidikan Kimia Undiksha Jurnal Penelitian Pendidikan IPA (JPPIPA) PEMBELAJAR: Jurnal Ilmu Pendidikan, Keguruan, dan Pembelajaran Indonesian Journal of Science and Mathematics Education JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI EDUKATIF : JURNAL ILMU PENDIDIKAN ALKIMIA : Jurnal Ilmu Kimia dan Terapan MANAZHIM JURNAL PENDIDIKAN MIPA Pelita Eksakta Sainstek : Jurnal Sains dan Teknologi Jurnal Ilmiah Profesi Pendidikan Journal of Classroom Action Research PAKAR Pendidikan Edukimia FORUM PAEDAGOGIK Entalpi Pendidikan Kimia SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA BIOCHEPHY: Journal of Science Education Jurnal Pijar MIPA Jurnal Vokasi Mekanika Journal of Educational Sciences YASIN: Jurnal Pendidikan dan Sosial Budaya MASALIQ: Jurnal Pendidikan dan Sains JURNAL TUNAS PENDIDIKAN Entalpi Pendidikan Kimia TOFEDU: The Future of Education Journal Journal of Chemistry Education and Integration Pamasa: Jurnal Pengabdian kepada Masyarakat Jurnal Akademika Kimia Jurnal Pendidikan MIPA
Yerimadesi Yerimadesi
Laboratorium Penelitian Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka Padang 25131
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Development of Salt Hydrolysis Module Based on Problem Based Learning Integrated with TPACK to Improve Numeracy Literacy Skills of Phase F SMA Students Febrila, Putty Zinda; Yerimadesi; Andromeda; Alizar
Jurnal Penelitian Pendidikan IPA Vol 10 No 10 (2024): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i10.8615

Abstract

This research aims to analyze the validity, practicality and effectiveness of the salt hydrolysis module based on problem based learning integrated with TPACK on students numeracy literacy skills. The development model used is the 4-D model. The module developed was validated by two lecturers and three chemistry teachers. The practicality testing of the module was carried out by three chemistry teachers and 32 SMA students. Testing the effectiveness of the module was carried out using a pre-experimental method with a non-equivalent control group design. The validity test was analyzed using the Aiken's V formula where content and construct validity were obtained respectively 0.91 and 0.92 with the valid category. The practicality test was analyzed using the Aiken's V formula where the practicality scores for teachers and students were obtained respectively 0.94 and 0.86 in the practical category. The module effectiveness test was analyzed using N-Gain where an N-Gain value of 0.76 was obtained in the high category. Based on the results of data analysis, it can be concluded that the salt hydrolysis module based on problem based learning integrated with TPACK developed is valid, practical and effective to improve the numeracy literacy skills of Phase F SMA students.
Enhancing Students’ Communication Skills through Project Based Learning in Chemistry Instruction at MAN 2 Bengkalis Aprilia Susilo, Resti; Amelia, Fitri; Yerimadesi, Yerimadesi; Noliea
The Future of Education Journal Vol 4 No 8 (2025)
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v4i8.1039

Abstract

This research aimed to enhance students’ communication skills in chemistry through the application of Project Based Learning (PjBL) at MAN 2 Bengkalis. The study utilized a Classroom Action Research (CAR) design following the Kemmis and McTaggart framework, which includes the stages of planning, acting, observing, and reflecting across three cycles. The participants were 24 eleventh-grade students in the 2024/2025 academic year. Data were gathered using observation sheets to evaluate communication abilities and post-tests to measure learning achievement. The findings demonstrated a steady increase in students’ communication performance, improving from 73% in Cycle I to 81% in Cycle II and reaching 86% in Cycle III. Progress was evident in four key areas: accuracy of responses, participation in group discussions, presentation quality, and teamwork. Additionally, students’ learning outcomes showed notable gains, with mastery levels increasing from 54% in the first cycle to 88% in the final cycle. These results suggest that implementing PjBL effectively fosters active engagement, improves collaboration, and strengthens students’ conceptual understanding of chemistry concepts. In general, the use of this model contributes to a more dynamic and meaningful classroom experience, supporting the cultivation of essential 21st-century competencies.
Improving the Active Participation of Grade X Students at SMA PGRI 1 Padang Through the Use of Chemical Element Card Media Az Zahra, Mentari; Yerimadesi, Yerimadesi; Friyatmi, Friyatmi; Jasniar, Jasniar
The Future of Education Journal Vol 4 No 8 (2025): #2
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v4i8.1046

Abstract

Active participation of students is one of the important aspects in improving the understanding of chemical concepts. This research is a Classroom Action Research that aims to increase the active participation of students in class X SMA PGRI 1 Padang through chemical element card media on electron configuration material and periodic table of elements. This research was conducted in two cycles which included the stages of planning, action implementation, observation, and reflection. Data were collected using observation sheets with physical and psychological indicators. The results showed an increase in students' active participation from 64.42% in cycle I to 86.95% in cycle II. Rewards proved to be effective in increasing students' active participation
VALIDITAS DAN PRAKTIKALITAS APLIKASI MOBILE SEBAGAI MEDIA PEMBELAJARAN PADA MATERI SISTEM PERIODIK UNSUR FASE E SMA/MA Khairurrazak, Khairurrazak; Kurniawati, Desy; Yerimadesi, Yerimadesi
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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Abstract

Penelitian ini bertujuan untuk mengembangkan aplikasi mobile sebagai media pembelajaran kimia pada materi sistem periodik unsur untuk siswa SMA fasa E yang memenuhi kriteria validitas dan praktikalitas. Penelitian ini menggunakan metode Research and Development (R&D) dengan model Four D (4D) yang meliputi tahap define, design, develop, dan disseminate. Pengumpulan data dilakukan melalui angket validitas dan praktikalitas, kemudian dianalisis menggunakan rumus Aiken's V dan persentase praktikalitas. Proses validasi melibatkan lima validator yang terdiri dari tiga dosen kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang dan dua guru kimia SMAN 1 Nan Sabaris. Uji praktikalitas dilakukan oleh dua guru kimia dan lima belas peserta didik SMAN 1 Nan Sabaris. Hasil penelitian menunjukkan bahwa media pembelajaran yang dikembangkan memiliki tingkat validitas yang tinggi, dengan nilai Aiken's V sebesar 0,976 untuk ahli materi dan 0,962 untuk ahli media. Sementara itu, hasil uji kepraktisan memperoleh skor 95% dari guru dan 94% dari peserta didik, yang termasuk dalam kategori sangat praktis. Dengan demikian, aplikasi mobile yang dikembangkan dinyatakan valid dan praktis untuk digunakan sebagai media pembelajaran kimia.
VALIDITAS DAN PRAKTIKALITAS MEDIA PEMBELAJARAN INTERAKTIF BERBASIS GAME VISUAL NOVEL PADA MATERI STRUKTUR ATOM UNTUK FASE E SMA/MA Trierdam, Gindi Lajen; Yerimadesi, Yerimadesi
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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Abstract

Struktur atom termasuk dalam kategori materi sulit karena konten yang sangat abstrak, dengan 59,73% siswa mengalami kesulitan memahami konsep dasar dan 74,91% kesulitan dalam perhitungan terkait, ditambah kurangnya media pembelajaran berbasis teknologi digital yang mendukung literasi digital peserta didik. Penelitian ini bertujuan untuk mengembangkan media pembelajaran interaktif berbasis game Visual Novel pada materi struktur atom untuk fase E SMA/MA. Metode penelitian yang digunakan adalah Research and Development (R&D) dengan model pengembangan four-D (4D) hingga memperoleh hasil yang valid dan praktis. Uji validitas dilakukan oleh tiga orang dosen kimia FMIPA UNP dan dua orang guru kimia SMAN 9 Padang. Uji praktikalitas dilakukan oleh dua orang guru kimia dan 20 orang siswa fase E SMAN 9 Padang. Instrumen yang digunakan berupa angket validitas dan praktikalitas. Uji validitas dianalisis menggunakan formula Aiken's V dan uji praktikalitas dianalisis menggunakan persentase skor capaian kepraktisan produk. Dari hasil penelitian diperoleh nilai rata-rata Aiken's V sebesar 0,894 untuk aspek media dan 0,9 untuk aspek materi dengan kategori valid, serta nilai praktikalitas oleh guru dan siswa sebesar 86,6% dan 92,25%-93% dengan kategori sangat praktis. Hasil penelitian menunjukkan bahwa media pembelajaran interaktif berbasis game Visual Novel pada materi struktur atom untuk fase E SMA/MA valid dan sangat praktis.
EFEKTIVITAS MODUL BENTUK MOLEKUL BERBASIS PROJECT BASED LEARNING TERINTEGRASI AUGMENTED REALITY TERHADAP KEMAMPUAN BERPIKIR KREATIF PESERTA DIDIK FASE F SMA Humaira, Zulfa; Yerimadesi, Yerimadesi
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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Abstract

Pembelajaran bentuk molekul yang abstrak menyebabkan rendahnya kemampuan berpikir kreatif peserta didik. Penelitian ini bertujuan menganalisis efektivitas modul bentuk molekul berbasis Project Based Learning (PjBL) terintegrasi Augmented Reality (AR) dalam meningkatkan kemampuan berpikir kreatif peserta didik. Metode penelitian menggunakan quasi experiment dengan desain nonequivalent control group design yang melibatkan 40 peserta didik kelas XI SMAN 9 Padang. Data dianalisis menggunakan uji N-gain dan independent samples t-test. Hasil penelitian menunjukkan nilai N-gain kelas eksperimen sebesar 0,64 lebih tinggi dibandingkan kelas kontrol sebesar 0,31 dengan nilai Thitung (4,395794) > Ttabel (2,02809). Disimpulkan bahwa modul berbasis PjBL-AR efektif meningkatkan kemampuan berpikir kreatif peserta didik.
EFEKTIVITAS E-MODUL INTERAKTIF LARUTAN PENYANGGA BERBASIS GUIDED DISCOVERY LEARNING TERHADAP PENINGKATAN LITERASI MEMBACA DAN NUMERASI PESERTA DIDIK FASE F SMA Izzati, Fitria; Yerimadesi, Yerimadesi
BIOCHEPHY: Journal of Science Education Vol. 5 No. 2 (2025)
Publisher : MO.RI Publishing

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Abstract

Materi larutan penyangga bersifat abstrak, aplikatif, dan kompleks. Penelitian ini bertujuan untuk menganalisis efektivitas e-modul interaktif larutan penyangga berbasis guided discovery learning terhadap peningkatan literasi membaca dan numerasi peserta didik. Jenis penelitian yaitu Quasi eksperiment dengan pretest posttest control group design. Populasi penelitian ini yaitu seluruh peserta didik kelas XII fase F di SMAN 12 Padang. Teknik pengambilan sampel menggunakan purposive sampling dan terpilih kelas eksperimen XII FL-8 dan kelas kontrol XII FL-2. Instrument tes berupa soal pilihan ganda, pilihan ganda kompleks, dan uraian yang terdiri dari 5 butir soal. Hasil penelitian menunjukkan rata-rata n-gain untuk literasi membaca kelas eksperimen (0,60) dan kelas kontrol (0,51), sedangkan literasi numerasi kelas eksperimen (0,34) dan kelas kontrol (0,31). Pengujian hipotesis menggunakan uji t menghasilkan t hitung literasi membaca (2,59) dan numerasi (2,32) > t tabel (1,99), sehingga disimpulkan bahwa e-modul interaktif larutan penyangga berbasis guided discovery learning efektif dalam meningkatkan literasi membaca dan numerasi peserta didik fase F SMA.
Atmospheric Corrosion Inhibition of Steel Using Tea Leaf Extract in the Coastal Environment of Air Tawar, Padang Kurniawan, Niko; Saputra, Sabrizal; Dinalia, Dinalia; Yerimadesi, Yerimadesi; safitri, sauli
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp123-131

Abstract

This study evaluates the effectiveness of tea leaf extract as a corrosion inhibitor for steel under real coastal atmospheric exposure. The novelty of this work lies in its direct assessment of a plant-derived inhibitor in an open-air marine environment, a setting that has not been adequately addressed in previous studies, which have largely focused on controlled aqueous systems. In addition, this study employs mature tea leaves, an abundant agricultural byproduct with naturally high tannin content, processed through a simple, solvent-free extraction method, thereby offering a sustainable route for green inhibitor development. The extract was obtained from mature tea leaves through aqueous boiling, and its tannin content was quantified using UV–Vis spectrophotometry. ASSAB 760 steel specimens were coated by immersion in tea extract at varying concentrations and soaking durations, followed by natural exposure in a coastal environment for 1 to 30 days. Corrosion behavior was evaluated using the weight loss method. The results showed that mature tea leaves contained the highest tannin concentration (29530.95 ppm), supporting their selection for inhibitor application. The optimum extract concentration was identified as 11000 ppm with a 5-hour immersion time. Under these conditions, treated steel exhibited a substantially lower corrosion rate (7.78 × 10⁻⁵ g/cm²/day) compared to untreated steel (1.66 × 10⁻⁴ g/cm²/day), corresponding to a maximum inhibition efficiency of 84.71%. The inhibition mechanism is attributed to the formation of a stable Fe³⁺–tannin chelate complex that adsorbs onto the steel surface, forming a protective film that restricts the ingress of aggressive chloride-rich moisture in the coastal atmosphere. Overall, the findings demonstrate the practical viability of mature tea leaf extract as an effective and environmentally benign atmospheric corrosion inhibitor, providing field-relevant insight into sustainable protection strategies for marine-exposed steel infrastructure.
Development of Acid-Base E-Modules Based on Guided Discovery Learning Using React Native to Improve Problem Solving Skills of Phase F High School Students Rivo Juita Sudirman; Yerimadesi; Andromeda; Riga; Nofri Yuhelman
Jurnal Penelitian Pendidikan IPA Vol 11 No 7 (2025): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i7.12212

Abstract

The study aims to develop an acid-base e-module based on guided discovery learning using React Native to improve the problem-solving skills of senior high school students. The research method is Educational Design Research (EDR) using the Plomp model. The e-module using React Native is presented in the form of a mobile application that can be accessed on smartphones. The presentation of acid-base material in the e-module is adapted to the syntax of Guided Discovery Learning. The e-module was validated by 5 validators, including 3 subject matter experts and 2 media experts, using a questionnaire analysed with Aiken's V. Practicality was assessed by 9 students representing low, medium, and high ability categories using a questionnaire in the small group stage, analysed using achievement percentages. Effectiveness was determined by comparing pre-test and post-test scores of students using the N-gain formula. The validation results of the acid-base e-module using React Native were 0.90, categorized as valid, and the practicality of the e-module was 92%, categorized as highly practical. Effectiveness was obtained from N-gain data of 0.71, categorised as high (sufficiently effective). Hypothesis testing was conducted using the Wilcoxon test because the data was not normally distributed, with a sign of < 0.001, indicating that the acid-base e-module based on guided discovery learning using React Native can improve the problem-solving skills of senior high school students in phase F.
Design of a Chemical Literacy Test Instrument on Atomic Structure Material for Senior High School Students Faizah, Siti; Yerimadesi, Yerimadesi; Yuhelman, Nofri; Iryani, Iryani
Jurnal Pijar Mipa Vol. 21 No. 1 (2026)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v21i1.11447

Abstract

The low level of chemical literacy in Indonesia, reflected in PISA 2022 scores below the average, is driven by the limited use of literacy-based assessments and restricted access to proper evaluation instruments. This study aims to develop and validate a chemical literacy test instrument specifically designed for atomic structure material for Senior high School students, utilizing the Rasch model for rigorous psychometric analysis. Unlike previous studies that often integrate multiple chemistry topics, this research provides a specialized focus exclusively on atomic structure, featuring five contextual narratives and one infographic across seven essay items to capture deep conceptual understanding. This Research and Development (R&D) employed purposive sampling of students at SMA N 7 Padang. Data were analyzed using Content Validity Ratio (CVR) for logical validity and Rasch modelling via Ministep software for empirical validation. The Rasch model was selected over classical test theory to ensure linear measurement of both item difficulty and student ability. SME evaluations confirmed the logical validity of all items. Empirical analysis showed that although some items exhibited higher outfit values, they were retained because of strong point-measure correlations with the measured construct. Item reliability was categorized as good, person reliability as fair, and Cronbach’s alpha was categorized as good. The instrument effectively categorized item difficulty and student discrimination power into three ability levels (high, medium, and low). The resulting seven-item instrument is valid, reliable, and practically feasible for educators to integrate into formative assessments to measure students' chemical literacy in atomic structure.
Co-Authors Abdul Razak Afendi, Silvia Afriandi, Muhammad Aini, Faizah Qurrata Alifa, Zaqiya Zahwa Alizar Amanda, Refni Juwita Andromeda Andromeda Andromeda Andromeda Antika, Rindi APMIYANTI, TIARA Aprelianda, Nola Apriani Sijabat Aprilia Susilo, Resti Ardiansyah, Nofry Arfianti, Fina Ariani, Siti Nurfaizah Asnizar, Asnizar Asrizal Az Zahra, Mentari Bayharti Bayharti Desnita Desy Kurniawati Desyafrianti, Vanny Dewi, Suci Firma Dinalia, Dinalia dion, nofrion Effendi, Novicha Erman, Sylvia Dwi Fadhilah, Najwa FADILLAH, MARSHANDA Faizah, Siti Fauzana Gazali Febrila, Putty Zinda Festiyed Fitri Amelia Fitri Arsih Fitri, Bali Yana Fitria Wijayanti, Fitria Fitriani, Mediana Friyatmi Friyatmi Gunawan, Revi Gina Gunawan, Rilla Gina Guspatni Guspatni Hafiza, Ufaira Heffi Alberida Hendri, Jhon Humaira, Zulfa Ilahi, Dian Purnama Ilwandri, Ilwandri Indang Dewata Irdes Hidayana Siregar Iryani Iryani Isti, Meila Iwefriani, Iwefriani Izzati, Fitria Jaslin, Syafriffah Jasniar, Jasniar Jr, Fachrur Rachman Juanta, Palma Julia Wulandari, Julia Junil Adri Jupinta, Agusri Kamilah, Rodiatul Khairurrazak, Khairurrazak Kristalia, Azizah Kurnia, Reni Kurniawan, Niko Legi, Wiwit Fitrah LESTARI, TASYA Lisa Utami Lufri Lufri Mahesa, Anggita MARCHELINA, SALSABILLA Minda Azhar Nadia, Nadia Afrianti Nofita, Agnes Nofri Yuhelman Nofri Yuhelman Nofrianto Nofrianto Noliea Oktavirayanti, Risa Pratiwi, Fitra Adinda Putra, Ananda Putri, Yunella Eka Qiram, M. Abdul Rahimah, Nikmatur Rahmanelli Rahmanelli Ramayanti, Nofia Riga Rindiany, Nindy Aprillia Ririanti, Ririanti Rivo Juita Sudirman Safitri, Sauli Sakinah, Mutiara Salsabila, Diva Santosa, Tomi Apra Saputra, Sabrizal Septiani, Ulfa Skunda Diliarosta Sofianora, Aulia Sovia, Eka Syafrilianto, Syafrilianto Syamsiar, Syamsiar Syukri S Trierdam, Gindi Lajen Ulfa Khaira, Ulfa Ulfa Weni Utomo, Erwin Pri Wildayati, Wildayati Yohandri Bow Yuli, Serli Sukma Yuni Ahda Yusmaita, Eka Zulyusri Zulyusri Zuwita, Ariani