JTK (Jurnal Tadris Kimiya)
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IMPROVEMENT OF CRITICAL THINKING ABILITY IN ACID BASE MATERIAL THROUGH THE APPLICATION OF EDMODO-BASED DISCOVERY LEARNING MODEL
Get PDFThis study aimed to determine the improvement of students' critical thinking abilities through the application of edmodo's assisted discovery learning model. The study was conducted on students of class XI MIPA 2 high school 2018/2019. This study used a true experimental design in the form of a pre-test and post-test control group design. Sampling was done by a cluster random sampling technique. Data collection used reasoned multiple choice test instruments and questionnaires. The result of test analysis of students' critical thinking skills showed that the average post-test value of the experimental class was lower than the control class. The N-gain test result showed that the magnitude of the increasing of the experimental class was 0.43 lower than the control class which is equal to 0.57. The application of edmodo assisted discovery learning model had a positive effect on students' critical thinking abilities with a low category as indicated by the correlation coefficient of 0.37 and the magnitude of the influence given is 14.08%. The conclusion of this study is the application of edmodo assisted discovery learning model can improve students' critical thinking skills. Furthermore, students agree to use edmodo's assisted discovery learning model for acid base learning.This study aimed to determine the improvement of students' critical thinking abilities through the application of edmodo's assisted discovery learning model. The study was conducted on students of class XI MIPA 2 high school 2018/2019. This study used a true experimental design in the form of a pre-test and post-test control group design. Sampling was done by a cluster random sampling technique. Data collection used reasoned multiple choice test instruments and questionnaires. The result of test analysis of students' critical thinking skills showed that the average post-test value of the experimental class was lower than the control class. The N-gain test result showed that the magnitude of the increasing of the experimental class was 0.43 lower than the control class which is equal to 0.57. The application of edmodo assisted discovery learning model had a positive effect on students' critical thinking abilities with a low category as indicated by the correlation coefficient of 0.37 and the magnitude of the influence given is 14.08%. The conclusion of this study is the application of edmodo assisted discovery learning model can improve students' critical thinking skills. Furthermore, students agree to use edmodo's assisted discovery learning model for acid base learning
SCIENCE, ENGINEERING, AND TECHNOLOGY OF DYE SENSITIZED SOLAR CELLS: A DIDACTICAL DESIGN BASED ON TECHNOCHEMISTRY EDUCATION
Get PDFThis research was conducted to build a view of the nature of science and technology (VNoST) chemistry education students' ability through the didactical design reconstruction. The material taken is Dye-Sensitized Solar Cells (DSSCs) topic with technochemistry education model. It is a model that looked at education from the perspective of engineers and scientists who work not only on inquiry but also on a design perspective. Based on literature research, Indonesian students had low academic literacy performance as revealed in PISA (Program for International Student Assessment) study from 2000-2015. This problem can be caused by a weak teacher's abilities of the nature of science and technology (VNoST). This research's method is Research and Development (R&D) through the Model of Educational Reconstruction (MER). The instruments used were the VNoST questionnaire, interview guidelines, and content analysis guidelines. This study's subjects were 25 prospective chemistry education students in the 6th semester for pre-conception study and ten students for implementation study at one of State Universities in Indonesia. The didactical design of learning that has been developed had several advantages, including the prediction of student responses and the anticipation of educators as well as the essential material that is a barrier to student learning. Analysis of the VNoST understanding construction patterns is explored further so that the reasons that underlie students in defining science and technology and their relationship are obtained. The implementation study proved that understanding VNoST students after attending didactical design learning improved by changing students' views on science and technology to be more accurate
THE DEVELOPMENT OF 3D INTERACTIVE MULTIMEDIA ORIENTED SPATIAL VISUALLY ON POLAR AND NONPOLAR COVALENT BONDING MATERIALS
Get PDFVisual-spatial is needed to improve submicroscopic understanding, such as polar and nonpolar covalent bonding materials. Not many 3D interactive multimedia have been developed with visual-spatial orientation. This research aims to produce 3D interactive multimedia with spatial-visual orientation on polar and nonpolar covalent bond materials suitable for use. The research design uses an R&D (Research and Development) research model developed but restricted to a limited trial step. The eligibility criteria include validity (content and construct) and practicality. The validity criteria are based on the results of the validity assessment data from three validators. Practicality criteria are based on the assessment given by three chemistry teachers shortly after the visual-spatial-oriented 3D interactive multimedia trial. Overall data were analyzed descriptive- quantitatively. The results of the study concluded that the developed 3D interactive multimedia meets the eligibility requirements. Each validation indicator in 3D interactive multimedia receives an assessment from the validator with mode (Mo) at least 4 in the score range 1-5 and the percentage of agreement (R) between validators above 75%. The 3D interactive multimedia meets practicality requirements because each indicator receives an assessment from the user students with (Mo) at least 4 in the score range 1-5. The percentage of agreement (R) between user students is above 75%. Â
EFFECTIVENESS OF INQUIRY-BASED LEARNING TOWARDS MASTERING THE CONCEPT OF UNSATURATED HYDROCARBONS IN UNDERGRADUATE STUDENTS
Get PDFInquiry learning can be applied to chemistry learning at any level of education. This is according to the characteristics of chemistry, which is based on empirical evidence for real-world study. One of the topics studied in Organic Chemistry Lecture is an unsaturated hydrocarbon that discussed the structure, nomenclature, properties, manufacture, and usability. There are various models or strategies of inquiry for chemistry learning, especially guided inquiry. One of the guided inquiry-based chemistry learning strategy innovations is the OE3R (Orientation - Exploration - Explanation - Elaboration - Reflection) strategy for various education levels, high schools, and universities. This research aimed to determine the effectiveness of guided inquiry-based learning with OE3R strategy in undergraduate students' conceptual understanding of the Unsaturated Hydrocarbon concept. The research using a Quasi Experiment with a pretest-posttest control group design. Conceptual understanding with OE3R Strategy proven to be better than Expository Strategy. This can be seen from achieving minimum completeness criteria, which is 92.3% for OE3R and 72.2% for expository. It can also be seen from the N-gain value for the OE3R Strategy (0.43), which is significantly better than the Expository Strategy (0.27)
THE EFFECT OF MOBILE LEARNING AND LEARNING STYLES ON STUDENTS’ SCIENTIFIC LITERACY IN SALT HYDROLYSIS CONCEPT
Get PDFThis study aimed to determine the effect of mobile learning and learning style on students’ scientific literacy in the salt hydrolysis concept. This research was conducted at Senior High School 42 Jakarta with a sample of 56 students consisting of 28 students with visual learning style and 28 students with auditory learning style. The sample in the study was randomly selected. The research method used was experimental with 2x2 design level treatment and analyzed by Two-Way ANOVA. The results showed that there were differences in scientific literacy between groups of students who used mobile and traditional learning (without considering learning styles) and groups of students who used a combination of consideration of learning styles and mobile learning. The use of mobile learning has a positive effect on scientific literacy outcomes when applied to group visual learning styles. Whereas, in the audio learning style group, the use of mobile learning media provided lower scientific literacy results compared to traditional learning media
DEVELOPING POP-UP BOOK OF CHEMICAL HOUSEHOLD TOPIC FOR JUNIOR HIGH SCHOOL LEVEL
Get PDFThis study aimed to develop pop up book on Chemical in Household topic.  Method of the study used Research and Development by 4-D stages model; define,design,develop and disseminate. Validation sheet and practically questionnaire were the instrument to collect the data. The pop up book was validated by four experts, 2 lecturers from the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, 1 lecturer of FBS Fine Arts, Universitas Negeri Padang and 1 junior high school science teacher. The practicality of the instructional materials was carried out on 1 science teacher and 27 eighth grade students at SMP Negeri 21 Padang. The data obtained were analyzed by using Cohen Kappa Formula. The validity test of the  Pop Up book obtained an average value of kappa 0.87 moment with a very high category and a practicality test for the book based on the results of data analysis from teachers’ and student questionnaires. The response of teachers’ questionnaires obtained a 0.89 kappa moment value with a very high practicality category.  The response of students’ questionaires got an average moment value of kappa 0.83 with a very high practicality category. The result also showed that the Pop Up book can increase students' interest to learn and understand science lessons in junior high school level
TRAINING OF SCIENCE LITERACY SKILLS IN CHEMICAL EQUILIBRIUM THROUGH IMPLEMENTATION GUIDED INQUIRY LEARNING
Get PDFScience literacy is the main key to face challenges in the 21st century. The research aimed to describe the students’ science literacy on chemical equilibrium topic through implementation of guided inquiry learning model. The research design used is One-Group Pretest-Posttest Design. The research was conducted in class XI MIPA 4 of SMAN 3 Surabaya. Data obtained by instruments of multiple-choice tests of science literacy and observation sheet. The result showed that every aspect of students’ science literacy skills was increased in the medium criteria, it was indicated by an average gain score of 0.6 for competence to explain scientific phenomena and to evaluate data and design scientific investigations. Moreover competence of interpreting data and scientific evidence obtained gain score of 0.7. The result of this research indicated that the skill of science literacy had been trained to students
THE DEVELOPMENT OF ISLAMIC INTEGRATED BIOCHEMICAL TEACHING MATERIALS USING FOUR STEPS TEACHING METHOD
Get PDFIslamic-integrated learning is one of the implementations in realizing UIN Syarif Hidayatullah Jakarta’s vision. So, the teaching materials which are integrated with Islamic features are needed. This research aims to develop a biochemistry teaching material in the form of an Islamic-integrated enrichment book specifically on the theory of amino acid and protein that is feasible to be used. The method used in this study is the research and development method through the Four Steps Teaching Material Development (4S-TMD), which consists of selection, structurization, characterization, and reduction. The research data are obtained from the validation of Islamic-integrated chemical study by expert lecturers. The validation result was analyzed using the Guttman Scale, a comprehensive test of concept in the form of the main idea writing test on 60 students of 2016 generation of chemistry education were analyzed by giving a score of 1 for each correct answer, and a score of 0 for wrong answers, and the book's feasibility test in terms of language, presentation, performance, and graphic validated by media expert lecturers, and were analyzed using the Rating Scale. The validation of the Islamic-integrated chemistry shows that all concepts are powerful and worthy of being presented, with the percentage of 91.4%. The comprehensive test of concept shows that all of the concepts have a high level of comprehension. The percentage of students’ comprehensions of all concepts amounted to 92.7%, and all of the concepts are included in the easy category. Therefore there is no need for a reduction phase. Based on the results of the feasibility test of the book, it is obtained the average percentage of 85.5%, which indicates that the Islamic-integrated enrichment book of amino acid and protein material is suitable to be used in the learning of Islamic-integrated biochemistry course to increase student knowledge on biochemical concepts through Islamic aspects which can increase the faith to Allah SWT
USE OF 3D-VISUALIZATION MEDIA IN NUCLEOPHILIC SUBSTITUTION REACTION MATERIAL TO IMPROVE STUDENTS' CONCEPT MASTERY
Get PDFDevelopment of technology is increasingly rapid today, including in the field of education. Technological developments are sometimes not used properly in the learning process, so that students not actively studying in class. The purpose of this study was to determine the effect of using 3D visualization media on nucleophilic substitution reaction material to improve students' concept mastery. Research method used was a quasi-experiment with pre-test and post-test design, involved 68 students from two different universities in West Java. The test instrument to measure concept mastery consisted of nine reasoned multiple-choice questions. The results showed that the use of 3D visualization media in nucleophilic substitution reaction materials can improve students' mastery of concepts. Based on the N-gain calculation results, University A was better than University B except for the indicators of determining that obtained a medium category and sorting that obtained a low category. There were four indicators of concept mastery used, including determining, analyzing, linking, and sorting indicators
PERFORMANCE AND PEER ASSESSMENT ANALYSIS TOWARDS STUDENTS’ SCIENTIFIC WORK THROUGH STEM-BASED VIRTUAL LABORATORY LEARNING
Get PDFThis study aimed to analyze the application of performance and peer assessment to students' scientific work through a STEM-based virtual laboratory learning. The research design was used the One Group Pretest-Posttest and One-Shot Case Study. The research was carried out from July to September 2020 at Chemistry Education Department, one of the universities in Indonesia. The research subjects were chemistry education students for the 2018/2019 Academic Year with a purposive sampling technique. The research data was taken from the performance assessment observation sheet given before and after the laboratory practice learning process and the peer assessment questionnaire. The data listed on the observation sheet and questionnaire are then calculated for the percentage. Based on research results, it can be concluded that the implementation of performance and peer assessment of students' scientific work through STEM-based virtual laboratory learning are very competent criteria at 86% and competent at 84%. The results of the paired sample t-test of students' scientific work abilities assessed using the performance assessment have a Sig. (2- tailed) the value below 0.05, which is 0.000, where there is a difference in the average results of initial and final observations using performance assessment through STEM-based virtual laboratory learning. One sample t-test of students' scientific work abilities assessed using performance and peer assessment has Sig. (2- tailed) values of 0.011 and 0.002 indicate that the mean score of students’ scientific work is 75