JTK (Jurnal Tadris Kimiya)
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Fostering Scientific Literacy through Integrated STEM Teaching Materials on Basic Laws of Chemistry
Get PDFThe research aims to develop integrated teaching materials with a STEM approach to enhance students' scientific literacy, explicitly focusing on Basic Chemical Law Materials. The study utilized a Research and Development (R&D) approach employing the 4D (define-design-development-disseminate) research model. The research instruments included a test to measure students' scientific literacy and a non-test instrument to gather validation data from experts and assess student responses. The findings demonstrated high feasibility percentages, with 91.4% for content, 89% for presentation, 93.2% for language, 86.6% for scientific literacy, 93.2% for STEM, and 90% for media. Moreover, based on the scientific literacy test results, the N-gain pre-test and post-test indicated a substantial increase with a score of 0.74, classifying it as a high increase. Consequently, it can be concluded that developing integrated teaching materials with a STEM approach effectively enhances students' scientific literacy in basic laws of chemistry
Enhancing Students’ Conceptual Understanding and Learning Independence in Chemical Equilibrium using E-Module Based Guided Discovery Learning
Get PDFChemical equilibrium is considered abstract so it requires visualization by analogy through electronic modules combined with interactive multimedia teaching materials. This study aims to examine the influence of a guided discovery learning-based e-module on chemical equilibrium on the development of conceptual understanding and self-directed learning among 11th grade science students enrolled in the control and experimental groups. The research framework employed in this study follows a research and development (R&D) model. The participants were selected using the cluster random sampling technique. The e-module, developed based on GDL principles, was administered to 72 science 11th grade students through a quasi-experimental design involving a posttest-only control group. The research employed conceptual understanding test of chemical equilibrium and a self-directed learning questionnaire as data collection instruments. The disparities in conceptual understanding and self-directed learning between the control and experimental groups were assessed using the MANOVA (Hotteling's trace) test. There is a significant difference in both the overall and individual abilities of conceptual understanding and learning independence between students who used electronic modules based on GDL and those who did not, as indicated by simultaneous significance levels of 0.001 and individual significance levels of 0.009 and 0.004, all of which are smaller than 0.05
POGIL-Based Learning Tools to Improve Critical Thinking Skills and Self-Efficacy on Salt Hydrolysis Material
Get PDFTo carry out a learning process that can improve students' skills, appropriate chemistry learning tools are needed. This research aims to determine the characteristics and feasibility of POGIL-based learning tools, analyzing students' critical thinking abilities and self-efficacy before and after using POGIL-based learning tools. The research method used 4-D development model (Define, Design, Develop, and Disseminate). The subjects were 11th grade science student. Design were used pretest-posttest control group design. Learning tools developed are valid with a percentage of 93.7% in the construction aspect, 90% in the content aspect, and 100% in the language aspect. There was an increase in students' critical thinking skills and self-efficacy after using POGIL-based learning tools with the percentage of students' effective contribution in critical thinking skills being 30.5% and to self-efficacy 69.2% (both showed high contribute). This indicates that POGIL-based learning tools are feasible to improve students' critical thinking skills and self-efficacy
Explorative Research Course: Recovering Rare Earth Elements from Electronic Waste Using Deep Eutectic Solvents
Get PDFThis study aims to demonstrate how a course design approach based on explorative research involving systems thinking can be implemented by recovering Rare Earth Elements (REEs) using Deep Eutectic Solvents (DES). The method used in this research is Design-Based Research (DBR). The instruments used were questions regarding the measurement of leaching samples from results/characterization, short questions about concept maps, and student response questionnaires. Data from measurements of leaching samples was measured using a Fourier Transform Infrared Spectrometer (FTIR), data about concept maps was measured by the number of component and process concepts in the context of electronic waste recycling that students were able to identify, and student response data was measured using a Likert scale. Based on the research results, recovery of REEs can be done using DES. It can be shown by a shift in the peak vibration of 497.65 cm-1 from the sample before leaching to a vibration of 449.43 cm-1 after leaching. In addition, this study yields new insights into the perceptions of future pre-service chemistry teachers regarding the possibility of new types of DES in the context of chemistry learning. According to pre-service chemistry teachers, recovering REEs from electronic waste and applying DES are interesting as a new context for laboratory learning. Context-based design of research activities can enhance system thinking and interest in chemistry. The results of study showed increased student’s systems thinking abilities, as shown by the component and process concepts that emerged from the pre-test by 652 concepts while the post-test increased by 1208 concepts
Fostering Trustworthy (Amanah) Character: Investigating the Impact of Integrating Religious Values into Thermochemical Module
Get PDFThe character of trustworthy (amanah) is fundamental to the inherent constitution of the human psyche, and its integration is crucial in daily practices. Thermochemistry, as a chemical discipline intricately connected to the ambient environment, encapsulates latent character values that often remain unarticulated within the educational discourse. This research aims to determine the effectiveness of a thermochemical module containing religious values on forming a trustworthy (amanah) character in the chemistry learning process. This research uses a quasi-experimental type with a one-group pretest and posttest design to examine the effectiveness of the module that has been developed. Data collection is taken from a pretest and posttest character assessment sheet comprising five indicators. Besides, the data analysis technique was descriptively based on the N-gain test. The results showed an increase in the formation of students' trustworthy (amanah) character after using the thermochemical module containing religious values, where the average pretest percentage was 68.42% in the sufficient category (starting to appear) to the average posttest percentage of 78.92% in the good category (starting to develop). In addition, the average N-gain score was 0.56 in the medium category, and the average N-gain score percentage was 56.16%, with the interpretation being quite effective. Hence, this data shows that the thermochemistry module containing religious values was helpful in the chemistry learning process and influenced the formation of trustworthy (amanah) character.The character of trustworthy (amanah) is fundamental to the inherent constitution of the human psyche, and its integration is crucial in daily practices. Thermochemistry, as a chemical discipline intricately connected to the ambient environment, encapsulates latent character values that often remain unarticulated within the educational discourse. This research aims to determine the effectiveness of a thermochemical module containing religious values on forming a trustworthy (amanah) character in the chemistry learning process. This research uses a quasi-experimental type with a one-group pretest and posttest design to examine the effectiveness of the module that has been developed. Data collection is taken from a pretest and posttest character assessment sheet comprising five indicators. Besides, the data analysis technique was descriptively based on the N-gain test. The results showed an increase in the formation of students' trustworthy (amanah) character after using the thermochemical module containing religious values, where the average pretest percentage was 68.42% in the sufficient category (starting to appear) to the average posttest percentage of 78.92% in the good category (starting to develop). In addition, the average N-gain score was 0.56 in the medium category, and the average N-gain score percentage was 56.16%, with the interpretation being quite effective. Hence, this data shows that the thermochemistry module containing religious values was helpful in the chemistry learning process and influenced the formation of trustworthy (amanah) character
The Development of an Affective Assessment Instrument Based on Creativity and Critical Thinking on Reaction Rate Material
Get PDFThis study aims to determine the characteristics of the assessment instrument, feasibility, and description of the affective aspects of students in the reaction rate material. The measure affective aspects are creativity and critical thinking attitudes. The research method is research and development (R&D) developed with a 4-D model. The research subject was taken from second-grade Senior High School with a random sampling technique. The initial product of the instrument was content validated by expert judgment, which was calculated using the Aiken formula and construct validity using Confirmatory Factor Analysis. The results showed that the instrument was declared feasible based on the content validity of 0.976 with a good category. The construct validity results stated that 18 fit items from 21 statement items. The description of the affective aspects of students in the reaction rate material from 213 students showed that the average student is in a good category
Challenge in Biochemistry Courses: A Snapshot of Student Learning Difficulties
Get PDFBiochemistry with a broad and complex scope of material causes students to have difficulty in visualizing or understanding the concepts (metabolic pathways, molecular structures, and terms in biochemistry).This study aims to get an overview of students' learning difficulties in studying biochemistry. The study used a descriptive method. The research subjects were students of Biology Education at one of the universities in West Sumatra. The research instrument consists of a questionnaire of student opinions on learning difficulties and a test of mastery of concepts. It was found that 26.47% of students had difficulties in molecular structure material, 58.82% in metabolic pathway material, and 14.71% in term in biochemistry material. The students have difficulty in learning biochemistry concepts as shown by average lecture achievement score of 0.51 which is in a quite difficult range. The questionnaire results of student opinions on learning biochemistry show that 27% of students like learning using the practicum method
Chemical Learning Module Based on Multiple Representations of Redox Materials
Get PDFThis study aims to create and evaluate the effectiveness of a chemistry learning module based on various redox material representations. Research and development (R&D) is the methodology used in this research: using a 4D model. It consists of defining, designing, developing, and disseminating stages. The research was carried out until the development phase. The quality of the module was assessed by material experts, media experts, and reviewers (chemistry educators). The respondents are 32 students in first grade of Senior High School Science class. Quality assessment and student responses were made using a Likert and Guttman scale questionnaire sheet. The result shows that the percentage of objectives found by validating all aspects of the module's content by media, reviewers, and chemistry educators experts are 91.6%, 94.7%, and 81.25%, respectively, with excellent categories, and students responded positively to the module. The module is considered helpful as a learning media for redox topics
Exploration of Student's Critical Thinking Skills in the Context of Chemistry Based on the Nature of Science
Get PDFUnderstanding the Nature of Science (NoS) could help improve thinking and reasoning skills. Students could use their critical thinking (CT) skills to help themselves in solving problems. Based on the NoS, this study sought to assess the CT skills of chemistry pre-service teachers at university. This study used a qualitative with a case study as the method. A purposive sampling technique was elaborated to select the research object. The respondents were chemistry students at university. The data sources were open-ended questions and interviews from the NoS questionnaire. The method of data triangulation was employed to conclude the study findings. The results showed that the CT skills possessed by chemistry pre-service teachers: were interpretation skills, inference skills, and self-regulation skills. Those skills were still in the low category. The participants also lacked in explaining, evaluating, and analyzing the students' abilities. Thus, the understanding of NoS informants can be categorized in the transitional cohort. The research findings became the department's input because some students still struggled to analyze NoS aspects in chemistry, especially through each stage of CT skills. Hence, future research is suggested to develop the students' CT skills in applying the NoS aspect in chemistry learning, especially for the pre-service teacher
Development of Google Sites-based Multiple Representations Learning Media on Benzene and Its Derivatives Topic
Get PDFCOVID-19 pandemic accelerated the transformation of education and forced the digitalization of education to create effective learning. The understanding of complex chemical structures and reactions holds great significance in the realm of chemistry education. Benzene and its derivatives are particularly challenging topics that require a robust representation approach. The research aims to develop and assess the feasibility of Google Sites-based multiple representations learning media on benzene and its derivatives material. The research utilized the Research and Development (R&D) approach, adhering to the ADDIE (analysis, design, development, implementation, and evaluation) development model. The research was carried out until the development stage. The developed learning media effectively integrated three levels of chemical representation for benzene and its derivatives, utilizing various features such as text, animation, video, 3D molecular simulation, and images. The validation conducted by content and media experts indicated that the learning media is valid with scores of 95.8% and 92.5%, respectively, with excellent category. Furthermore, the product quality assessment conducted by experts and students' responses showed that media could be used practically, with percentages of 95% and 95% as excellent categories. These findings confirm the suitability of the developed learning media for facilitating students' understanding of benzene and its derivatives during the learning process