Articles

Development of Problem-Solving-Oriented Electronic Module (E-Module) to Improve The Critical Thinking Skills of Class XI Senior High School Students on Acid-Base Material

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The Independent Curriculum is a solution to the tight competition for human resources in the 21st century. The critical thinking skills needed in the 21st century can be improved through studying chemistry, especially acid-base materials. The problem-solving learning model is an appropriate learning model for understanding acid-base materials and can improve students’ critical thinking skills. Learning media that can be used in chemistry learning are electronic modules. The aim of this research is to develop a problem-solving-oriented e-module to improve critical thinking skills in acid-base materials. The development model in this research uses the 4D model by Thiagarajan. The development of problem-solving-oriented e-modules was declared suitable for improving students’ critical thinking skills in acid-base material in terms of validity, practicality, and effectiveness. Validity is seen in content and construct validity, both of which received a mode value of 5 in the very valid category. Practicality can be seen from the results of the student response questionnaire, which obtained a percentage of  98.75℅ in the very practical category and is supported by the results of observations of student activities. Effectiveness can be seen from the results of the students’ critical thinking skills pretest and posttest, which obtained a significance value of 0.00 using the paired sample t-test.

The Effectiveness of Discovery Learning-Based E-Modules to Improve Student Understanding

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This research aims to produce thematic e-module products based on discovery learning that are feasible and effective in improving the comprehension ability of learners. This research is a type of Research and Development (R&D) research. The research was conducted referring to the theory of Borg & Gall (2003). The population of this study was class V students of the Ki Hajar Dewantara Cluster. The sample of this study was determined by Cluster random sample and saturated sampling taken at two different schools and obtained as many as 50 students. Data collection tools use valid and reliable test instruments. The effectiveness data analysis technique uses an effect size test with results of 0.937 in sample A and 0.932 in sample B. Based on data analysis from the results of the study, it is concluded that thematic e-modules based on discovery learning are effective for improving the ability of elementary school students to understand.

Development of E-Module Based on Problem Based Learning by Using Adobe Flash Professional CS6 on the Material of Human Respiratory and Excretory Systems for Students of Class VIII SMPN 25 Padang

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Good results from education must be accompanied by effective learning. Effective learning one of which is influenced by the use of teaching materials. Preliminary investigation data at SMPN 25 Padang show that there is no teaching material in the form of an e-module that can visualize the subject matter as a whole. Based on the results of the questionnaire, it is known that 67.16% of students have difficulty understanding the concepts of the respiratory system and the excretory system. This causes the low learning outcomes for students, so teaching materials are needed that can assist in visualizing the subject matter as a whole. This study aims to produce an e-module based on problem based learning using adobe flash professional CS6 on the material of the human respiratory and excretory systems for students of class VIII that is valid, practical, and effective. This type of research is the Plomp model development research which consists of three phase, namely the initial preliminary research phase, the development or prototyping phase, and the assessment phase. The research subjects are students of class VIII SMPN 25 Padang Academic Year 2021-2022. The research data were obtained from validity, practicality, and effectiveness tests. The validity test data was obtained through a validation sheet by lecturers as validators. Practical test data was obtained from the results of the questionnaire response analysis of teachers and students. Effectiveness test data were obtained from multiple choice question sheets for assessing cognitive competence, observation sheets for assessing affective competence and psychomotor competence, and essay question sheets for assessing students creative thinking skills. The results of validation by validators on the e-module based on problem-based learning show an average value of 86.35% (very valid). The results of the practicality assessment by science teachers showed an average of 90.87% (very practical) and the results of the practicality assessment by students obtained an average value of 89.25% (very practical). The results of the effectiveness test from the cognitive, affective, and psychomotor aspects of students showed that the problem based learning based e-module was very effective and the value of creative thinking skills obtained an average of 74.24 (creative). Thus, it can be concluded that the problem based learning based e-module developed is very valid, very practical, very effective, and can train creative thinking skills.