This study aimed to improve the retention of Integrated Science (IPAS) learning materials among third-grade students of SD Negeri Gamping through the use of flashcard media. Learning retention is a crucial aspect in elementary education as it reflects students’ ability to recall previously learned material over a certain period. This research employed Classroom Action Research (CAR) conducted in two cycles, each consisting of planning, implementation, observation, and reflection stages. The subjects of this study were 23 third-grade students in the 2025/2026 academic year. Data were collected through retention tests, observation, and documentation. The retention test was administered several days after the post-test to measure students’ memory retention. Data were analyzed using descriptive percentage analysis. The results showed a significant improvement in students’ retention after the implementation of flashcard media. At the end of the study, 82.6% of students achieved a high retention category, exceeding the predetermined success indicator of 75%. In addition, students’ activeness and engagement in the learning process increased from Cycle I to Cycle II. These findings indicate that flashcard media are effective in improving students’ retention of IPAS learning materials.
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