Jurnal Pendidikan dan Pembelajaran Kimia
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Application of The SiMaYang Type II Learning Model in Increasing Understanding of The Concept of Chemical Bonds
Full text linkSiMaYang (Si Lima Layang-Layang) Learning Model is an approach designed to combine aspects of simulation and real analogies in the learning process. This model aims to increase student involvement, make it easier to understand the material, and encourage critical thinking skills Purpose: The aim of this research is to analyze the effectiveness of the SiMaYang learning model in improving students' conceptual understanding of chemical bonding material. Method: The research employed a quasi-experimental method with a pretest-posttest control group design. Findings: A comparative analysis between the experimental class, which implemented the SiMaYang model, and the control class, which utilized a conventional approach, revealed substantial differences in learning outcomes. At the outset, both groups demonstrated similar baseline abilities, with pretest scores showing only 28% correct answers. Following the application of the SiMaYang model, the experimental class exhibited a remarkable improvement, achieving 93.3% correct answers in the posttest. In contrast, the control class only reached 59.1% correct answers with N-gain values between the control class (0.43) and the experimental class (0.94) This significant disparity underscores the effectiveness of the SiMaYang model in enabling students to construct knowledge more effectively. Conclusion: The SiMaYang learning model has been demonstrated to significantly enhance the quality of chemistry education. From a methodological perspective, the SiMaYang model successfully develops students' metacognitive skills through a structured approach that actively engages them in constructing knowledge, engaging in critical reflection, and formulating their own thinking strategies.Keywords: SiMaYang Type II, Learning Model, Chemical Bond.DOI: 10.23960/jppk.v13.i3.3285
HKSA ANALYSIS AND DOCKING OF ANTIOXIDANT ACTIVITY OF CURCUMIN ANALOGUES AGAINST TYROSINASE ENZYME
Full text linkAbstract : The aim of the HKSA and Docking analysis was to determine the potential of curcumin analogues as antioxidants for the activity of the tyrosinase enzyme. Predictor calculations were carried out using the hyperchem application with the CNDO semi-empirical geometric optimization method Multilinear regression analysis using SPSS to find the relationship between predictors and the activity of curcumin analogue derivative compounds as tyrosinase inhibitors. The best HKSA equation model is : LogIC50 : -3.195 – (1.135 x HOMO) + (1.064 x LUMO) - (0.239 x LogP) + (0.155 x HE) With a value of R = 0,984; R2 = 0,969; Adj R2 = 0,948; SE = 0,183; F count = 10,209; Sign = 0,000. This equation is used to predict new compounds derived from curcumin analogs that can be used as new tyrosinase inhibitors. The parameters for selecting this compound were because it had better activity and LogIC50 values compared to the parent compound. To see the affinity between the new curcumin analogue derivative compound and the tyrosinase enzyme, docking was carried out using Autodock Tools, which was visualized using Biovia discovery studio. The docking results show that the compound 2,5-bis (4-hydroxy 3-allyl benzylidene) cyclopentanone has potential inhibitory activity on the tyrosinase receptor as an antioxidant activity because it has the same amino acid residue as the original ligand (Tyrosine) with the binding energy of the compound 2,5- bis (4-hydroxy 3-allylbenzylidene) cyclopentanone is -5.92 kcal/mol and the Ki value is 46.03 uM, which is better than the binding energy of the compound (Tyrosine) which is -4.96 kcal/mol and the Ki value is 231.77 uM.Keywords: Curcumin, Tyrosinase, Antioxidant, QSAR, Docking DOI: 10.23960/jppk.v13i2.3056
Development of E-Modules Based on Project Based Learning (PjBL) on Periodic System of Elements Material
Full text linkThis research was conducted in November 2023-February 2024 at SMAN 1 Percut Sei Tuan with the aim of finding out: (1) the feasibility of e- learning modules based on Project Based Learning (PjBL) on periodic system of elements material based on the BSNP assessment instrument consisting of content feasibility, appropriateness of presentation, appropriateness of language and appropriateness of graphics, (2) practicality of e- learning modules based on Project Based Learning (PjBL) on material on the periodic system of elements through responses from chemistry teachers and students. This research was carried out with Research and Development (Research and Development ) using the 4D development model ( define, design, develop, disseminate) which is limited to the develop stage . The initial stages carried out in this research were initial analysis, ATP analysis, and analysis of teaching materials. Then the design and creation of e- learning modules based on Project Based Learning (PjBL) were carried out on the material of the periodic system of elements. The final result of the e- module is converted into a flipbook with the help of the Flip PDF Professional application . Then the e-module was validated for its suitability by 6 validators. After carrying out the feasibility validation stage and the revision or improvement stage, a practicality test was carried out through the responses of 2 chemistry teachers and 31 students. The results of the e- module feasibility percentage obtained in the research were content feasibility of 94%, presentation feasibility of 95%, language feasibility of 96%, and graphic feasibility of 85%, where the four assessments were included in the "very feasible" criteria. ". In the practicality test, the percentage obtained by the teacher was 96% and by the students it was obtained at 90%, with the criterion "very practical". Keywords: E- Module, project based learning, periodic system of elements, feasibility,practicality.DOI: 10.23960/jppk.v13.i1.2024.0
Implementation of STEM Problem Based Learning Model with Quizizz and iSpring Media Towards Student Learning Outcomes in Stoichiometry Material
Full text linkThis study aims to determine the significant differences in student learning outcomes using Quizizz Media and i-Spring Media with the STEM Problem Based Learning model on Stoichiometry material. The population in this study were students of class XI IPA at SMA Swata Sultan Iskandar Muda Meda which were divided into four classes. The research sample was students of class XI IPA selected using random cluster sampling techniques. The instrument used in this study was a test with 20 multiple choice questions. The data collected were in the form of student learning outcome ability test instruments. The results of the study were that there was a significant difference between student learning outcomes taught with the STEM-based Problem Based Learning model using Quizizz media with iSpring media with a Sig. (2-tailed) value of 0.001 ≤ 0.05.Keywords: Quizziz, iSpring, and Problem Based Learning.DOI: 10.23960/jppk.v13.i3.3233
The Influence of Problem Based Learning and Discovery Learning Models Assisted by Learning Video Media on Student Learning Results and Activities on Redox Reaction
Full text linkThis study aims to analyze the differences in learning outcomes and student engagement between the Problem Based Learning (PBL) model and the Discovery Learning (DL) model supported by learning videos, as well as to identify the relationship between these factors in the context of redox reactions at MAS Muallimin Univa Medan. The sample consists of two classes randomly selected from the Class X MIA population: the PBL class (X MIA 2) and the DL class (X MIA 3). The research instruments included a multiple-choice test with 20 valid and reliable questions to assess learning outcomes and an observation sheet to evaluate student engagement. Data were analyzed using independent sample t-tests. Results indicated that the PBL class had lower scores in both engagement and learning outcomes compared to the DL class. Statistical analysis revealed significant differences in engagement and learning outcomes (α < 0.05), with a positive correlation between student engagement and learning outcomes. The conclusion of this study is that there are differences in learning outcomes and engagement between the two models, as well as a significant relationship between student activity and learning success, with contribution rates for engagement reaching 64.3% and 24.9%.Keywords: Learning Outcomes, Learning Activities, Problem Based Learning, Discovery Learning, Learning Videos¸ Redox Reactions.DOI: 10.23960/jppk.v13.i3.3070
Validity of Green Chemistry Student Worksheet Based on Project Based Learning for Phase E at SMAN 9 Padang
Full text linkThe project-based chemistry learning process can be carried out by studying phenomena in the surrounding environment so that students are interested and actively involved in solving problems given by the teacher related to chemical concepts. One of the alternative teaching materials that can be used as support is Student Worksheet. This study aims to determine the validity category of project-based learning-based green chemistry student worksheets for phase E at SMAN 9 Padang that have been developed. This type of research is Educational Design Research (EDR) using the Plomp development model. Plomp's development model consists of the stages of preliminary research, prototyping and assessment, but in this study it is limited to the prototype III stage. The validity instrument used was a questionnaire consisting of content and construct validity. The results of the validity in this study obtained an average V value of 0.85 with the valid category. Based on these results, it can be concluded that the student worksheets developed are valid. DOI: 10.23960/jppk.v12.i3.2023.1
The Effect of Power Point Media Integrated with Animation on Student Learning Outcomes on Reaction Rate
Full text linkAbstract:The Effect of Power Point Media Integrated with Animation on Student Learning Outcomes on Reaction Rate. The purpose of this study is to ascertain whether animated power point presentations have an impact on students' learning of reaction rate material. All of the students in class XI MIPA SMA Negeri 7 Medan served as the study's population, and the research samples, class XI MIPA 3 and XI MIPA 4, which were chosen using the purposive sampling technique, comprised the study's research samples. The chemistry learning outcomes exam and student response questionnaire were the test-and-non-test instruments utilized in this study. Each test had up to 20 multiple-choice questions, while the response questionnaire had up to 12 affirmative statements. Based on one tiled t test, the tcount was 3.498 and tα was 1.67. Because tcount ≥ tα corresponds to the Ho rejection area, Ha is accepted. So it is concluded that the hypothesis is accepted, which means that there is an effect of PPT media integrated with animation on student learning outcomes on reaction rate material. Meanwhile, students' response to the PPT media integrated with animation was obtained as much as 1099 with a percentage of 76.319%. The acquisition of these results concluded that students in experimental class 1 who were taught with PPT media integrated animation had a response with a good category. Keywords: Problem Based Learning Model, Power Point Media, Learning Outcomes and Response, Reaction Rate. Abstrak:Pengaruh Media Power Point Terintegrasi Animasi Terhadap Hasil Belajar Siswa Pada Materi Laju Reaksi. Tujuan dari penelitian ini adalah untuk mengetahui apakah presentasi power point beranimasi berdampak pada pembelajaran siswa pada materi laju reaksi. Seluruh siswa kelas XI MIPA SMA Negeri 7 Medan menjadi populasi penelitian, dan sampel penelitian adalah kelas XI MIPA 3 dan XI MIPA 4 yang dipilih dengan teknik purposive sampling. Tes hasil belajar kimia dan kuesioner respon siswa merupakan instrumen tes dan non-tes yang digunakan dalam penelitian ini. Setiap tes terdiri dari 20 soal pilihan ganda, sedangkan angket respon siswa terdiri dari 12 pernyataan positif. Berdasarkan uji t pihak kanan diperoleh thitung sebesar 3,498 dan t adalah 1,67. Karena thitung t sesuai dengan daerah penolakan Ho maka Ha diterima. Sehingga disimpulkan bahwa hipotesis diterima, yang artinya terdapat pengaruh media PPT terintegrasi animasi terhadap hasil belajar siswa pada materi laju reaksi. Sedangkan respon siswa terhadap media PPT terintegrasi animasi diperoleh sebesar 1099 dengan persentase sebesar 76,319%. Perolehan hasil ini menyimpulkan bahwa peserta didik pada kelas eksperimen 1 yang dibelajarkan dengan media PPT terintegrasi animasi memiliki respon dengan kategori baik. Kata kunci: Model Problem Based Learning, Media Power Point,Hasil Belajar dan Respon, Laju ReaksiDOI: 10.23960/jppk.v12.i2.2023.0
Study Literature: Purple Cabbage (Brassica oleracea L) as a New Innovation Test Indicator for Biochemical Carbohydrate Fermentation
Full text linkAnthocyanins in purple cabbage can be dissolved in 96% alcohol. Under certain conditions, these anthocyanin compounds can experience color changes in acidic, alkaline, and neutral conditions. Utilization of purple cabbage carbohydrate fermentation test indicators, in the form of extracts. Which can be marked by a change in color, especially in the mannitol and lactose test media. The process of changing this color is from which initially there is no color at all to red. So with this in mind, some researchers concluded that purple cabbage extract could be used as an alternative color indicator for testing carbohydrate fermentation, especially mannitol and lactose. Keywords: purple cabbage, fermentation, indicator
Development of Evaluation Problems to Measure High Level Thinking Skills in Thermochemical Materials
Full text linkAbstract: DEVELOPMENT OF EVALUATION PROBLEMS TO MEASURE HIGH LEVEL THINKING SKILLS IN THERMOCHEMICAL MATERIALS. This research was conducted at the Laksamana Martadinata High School in Medan which aims to develop an evaluation instrument to measure students' high-level thinking skills in thermochemistry material using a 4D model of development (Research and Development, R&D) which includes, namely; Define (definition), Design (design), Develop (development), and Dissemenate (dissemination). The sample in the study was 36 students selected by purposive sampling. The instruments used are evaluation questions and validation sheets. The results of this study indicate that through the development of evaluation questions to measure higher-order thinking skills in thermochemistry material, at the higher-order thinking ability level by giving HOTS questions, the ability results are very low at 44 .5% and get very decent results on the validation sheet by expert validator namely; lecturers 91% and teachers 94%. The final product is in the form of 32 valid questions from the initial product design of 40 questions. The results of the data analysis showed that the evaluation item instrument to measure students' higher order thinking skills developed had met the feasibility of content validity with an average rating percentage of 90% and met the feasibility of construction validity so that the evaluation item instrument was considered good. This evaluation item instrument is effective and appropriate for use in the learning process which can be used as a tool to measure students' high-level thinking skills in Thermochemistry material. Keywords: High Level Thinking, Thermochemistry Material, Development of Evaluation Questions Abstrak: PENGEMBANGAN SOAL EVALUASI UNTUK MENGUKUR KETERAMPILAN BERPIKIR TINGKAT TINGGI PADA MATERI TERMOKIMIA. Peneitian ini dilakukan di sekolah SMA Laksamana Martadinata Medan yang bertujuan untuk mengembangkan instrumen soal evaluasi untuk mengukur keterampilan berpikir tingkat tinggi peserta didik pada materi Termokimia dengan menggunakan model pegembangan (Research and Development, R&D) model 4D yang meliputi, yaitu;. Define (pendefinisian), Design (perancangan), Develop (pengembangan), dan Dissemenate (penyebaran). Sampel dalam penelitian yaitu 36 orang peserta didik yang dipilih dengan cara purposive sampling. Instrument yang digunakan adalah soal evaluasi dan lembar validasi. Hasil penelitian ini menunjukkan bahwa melalui pengembangan soal evaluasi untuk mengukur keterampilan berpikir tingkat tinggi pada materi termokimia, pada tingkat kemampuan berpikir tingkat tinggi dengan memebrikan soal HOTS mendapatkan hasil kemampuan yang sangat kurang sebesar 44,5% dan mendapatkan hasil yang sangat layak pada lembar validasi oleh validator ahli yaitu; dosen 91% dan guru 94%. Produk akhir yang berupa 32 soal yang valid dari rancangan awal produk 40 butir soal. Hasil analisis data menunjukkan bahwa instrumen soal evaluasi untuk mengukur keterampilan berpikir tingkat tinggi peserta didik yang dikembangkan telah memenuhi kelayakan validitas isi dengan rata-rata persentase penilaian 90% dan memenuhi kelayakan validitas konstruksi sehingga instrumen soal evaluasi dianggap baik. Instrumen soal evaluasi ini efektif dan layak digunakan dalam proses pembelajaran yang dapat dijadikan sebagai alat untuk mengukur kemampuan keterampian berpikir tingkat tinggi peserta didik pada materi Termokimia. Kata Kunci: Berpikir tingkat tinggi, Materi termokimia, Soal EvaluasiDOI: 10.23960/jppk.v12.i2.2023.2
Literature Review: The Effect of the Flipped Classroom on Student Chemistry Learning
Full text linkThe research delves into the impact of the flipped classroom model on student learning outcomes in chemistry education, utilizing a literature review methodology and systematically analyzing nine scopus-indexed articles. The flipped classroom, characterized by independent pre-class learning and in-class interactive activities, consistently demonstrates positive effects on academic performance, engagement, and motivation in chemistry education. The synthesis encompasses diverse methodologies, educational levels, and outcomes, highlighting the model's adaptability across different contexts. Critiques, including uncertainties about contributing factors, prompt recommendations for future research, such as exploring blended learning models and integrating Artificial Intelligence for personalized learning experiences. In conclusion, while acknowledging variations and critiques, the literature underscores the flipped classroom's effectiveness and advocates for ongoing research to refine its implementation in diverse educational settings.Keywords: Flipped classroom, pendidikan kimia, teknologi pendidikan, tinjauan literatur DOI: 10.23960/jppk.v12.i3.23.1