Quick and real-time plotting equations using the Winplot software can be employed to create accurate hybrid atomic orbitals without complicated scripting. Performing this task on their own, students can more easily understand and remember hybrid atomic orbitals, in terms of shape and orientation.
This research aims to describe the effectiveness of the POGIL model to increase learning motivation and mastery of the concept of buffer solutions students. The research method used is quasi-experimentation with pretest-postest control group design. Sampling is done by random sampling cluster technique and obtained class XI IPA 3 as an experimental class and class XI IPA 4 as a control class. The effectiveness of the POGIL model was analyzed using the n-Gain two-average difference test to learning motivation and mastery of concepts learners' between experimental class and control class. The results of the analysis of the study data showed that the average value of n-Gain motivation learning of learners in the experimental class was greater than the control class, as well as the average grade of n-Gain mastery of concept of the experimental class was greater than the control class. The results of the influence test analysis also showed that increased learning motivation and mastery of the concept of buffer solution students were influenced by the POGIL model. It can be understood that learning with the POGIL model is effective to increase learning motivation and mastery of the concept of buffer solution students.
This research aims to describe the effectiveness of multiple representation based-student worksheets in improving students’ critical thinking skills. The research method used is a quasi-experiment by using pretest-posttest design. This research was conducted in one of the Lampung provincial junior high schools. The sample in this study amounted to 58 students consisting of two experimental classes obtained by using a purposive sampling technique. The data was gained by using questionnaire and test, and it analyzed by using paired sample t-test to investigate the effectiveness of the learning method in both groups of samples. The proposed methods show that there were differences of pretest and posttest score between the first and second experiment class as well as the size effect. Furthermore, students also give good responses to the learning process by using students’ worksheet based on multiple representations. For all test cases, the experimental results imply that Multiple Representation-based Student Worksheet is one of the effective ways of improving students’ critical thinking skills in the inheritance properties topic. This is evidenced by an average increase in all significant critical thinking indicators, especially indicators that advance clarification in the high category.
This study aims to develop an e-LKPD Based on the Nyeruit Ethnoscience, to describe its validity, practicality, and effectiveness to train Science Literacy on additives and addictive substances. Research and Development (R&D) is used as a research method based on Thiagarajan's four-dimensional model (Define, Design, Develop, Disseminate). 30 students participated as research subjects. Questionnaires were used to obtain validation data, learning practices, student response tests, and teacher responses. Efficacy is measured by pretests and posttests. The data analysis method used SPSS 24.0. As a result of this research and development, the development of an e-LKPD based on Nyeruit Ethnoscience has proven the effectiveness of the materials and media with a very high category of 84.7%. The utility of e-LKPD reaches 91.1% which is a very high standard. The effectiveness of the e-LKPD in teaching science literacy to students in the experimental class achieved a mean N-gain of 0.72, which was highly rated compared to the control class. The average N-gain is 0.54, indicating a moderate rating. Therefore, the development of an ethnoscience-based e-LKPD provides a large category effect size for improving students' science literacy.
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