<![CDATA[The low level of critical thinking skills among fourth-grade elementary school students in IPAS learning, particularly on the topic of photosynthesis, is caused by teacher-centered instruction and the use of conventional, less interactive learning media. This study aims to develop E-Phytopedia media based on the Project Komplit model and to examine its feasibility, practicality, and effectiveness in improving students’ critical thinking skills. The research employed a Research and Development (R&D) method using the 4-D model (Define, Design, Develop). The research instruments included expert validation sheets, teacher and student response questionnaires, and a critical thinking skills test. The results showed that the E-Phytopedia media was categorized as very feasible, with validation percentages of 95% from media experts, 88% from subject matter experts, and 82% from language experts. In addition, the media was considered very practical based on teacher responses (92%) and student responses (90%). The effectiveness test using an Independent Samples t-Test indicated a significant difference between the experimental class and the control class (Sig. < 0.05), with the experimental class obtaining a higher mean posttest score. Therefore, E-Phytopedia media is effective in improving students’ critical thinking skills.]]>
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