Learning during the Covid-19 pandemic has largely shifted to online learning. In response to this, it is necessary to prepare teaching materials that support online learning, one of which is the use of electronic models or e-modules. This is a development research with referring design to the ADDIE (Analyze, Design, Development, Implementation, and Evaluation) which aims to produce electronic modules on science subjects with digestive system material as teaching materials for VIII grade junior high school students to enhance problem solving skill. ADDIE development design includes identification of potentials and problems, data collection, product design, design validation, design revision, limited-scale product trials, product revisions, wide-scale use trials and final products. The resulting e-module is declared feasible based on validation by material and media experts and very feasible by linguists. The results of the limited and wide-scale trial showed very good interpretation based on student responses. acquisition of an average N-Gain score of 0,57 and categorized as moderate. The pretest and posttest scores obtained by students were 37,35 and 73,53 respectively. If viewed from the school KKM score of ≥70 then the average posttest score obtained is complete. The results showed that the electronic module in science subjects with digestive system material met the requirements and was suitable for use as teaching materials for grade VIII students of SMPIT Kaifa Bogor.
The purpose of this study was to determine the effect of Science, Technology, Engineering, and Mathematics (STEM) approach to the improvement of critical thinking skills using Problem Based Learning (PBL) models. The population of the research was all of the 10th grade IPA students in SMA Negeri 7 Bandar Lampung which were 233 students. The selection of research sample used a purposive sampling technique with the sample of class X IPA 5 that consisted of 31 students as the experimental group and the class X IPA 6, which was 30 students, as the control group. The research design used Non-Equivalent Pretest Posttest Control Group Design. Data were tested by N-gain analysis, normality test, homogeneity test, Mann-Withney U Test Effect size test. The results showed that there was a significant effect of the STEM approach in improving critical thinking skills as indicated by the Sig. (2-Tailed), which was less than 0.05, 0.000, and the average value of N-gain (g) critical thinking skills in the experimental class was 0.73 (high category) while the control class was 0.56 (medium category). Effect size showed a value (d) of 1.49 included in high category. It can be concluded that the application of STEM approach using PBL learning model can improve students critical thinking skills. Implications of the study are discussed. The use of the STEM approach using PBL learning model can be used as an alternative for teachers as an effort to improve students' critical thinking skills.
Environmental education amid Coronavirus Disease 2019 (COVID-19) pandemic requires innovation. The pandemic situation need to improving student attitudes in maintaining the environment need an improvement by conducting various innovations and one of them is ILMIZI learning model utilization. The research aim was to improve student attitudes with the ILMIZI model. The research method is experimental without a control class. Samples involved in the research consist of 61 students with a treatment of environmental learning using the ILMIZI model. The Instrument used in this research was the attitude instrument with a scale of 1-5. The research results suggest that t-value (.231) > t-statistic (1.67) indicating that the ILMIZI model is not yet effective in improving the students’ attitudes in maintaining the environment. The pretest score (83.80) and post-test score (83.62) are not significantly different. The conclusion drawn from the research is that the ILMIZI model has not effective in improving student attitudes in maintaining the environment during COVID-19.
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