<![CDATA[This was motivated by the limited availability of English learning media, as the media commonly used by teachers are still simple and lack variety, causing children to become easily bored and less enthusiastic about participating in learning activities. Based on this condition, this study aimed to develop magnetic flashcards as learning media that meet the criteria of validity, practicality, and effectiveness in supporting the improvement of English vocabulary mastery among children aged 5–6 years.This study employed the ADDIE development model, which consists of five stages: Analysis, Design, Development, Implementation, and Evaluation. The research subjects were 13 children from Class B4 at TK Islamiyah Pontianak. Data were collected using expert validation sheets and observation sheets to assess the children's abilities. The data were analyzed using descriptive quantitative techniques to determine the validity and effectiveness of the developed media.The results showed that the magnetic flashcards obtained a validity score of 1.00 from media and material expert validators, placing the media in the very valid category. Meanwhile, the results of the media effectiveness assessment based on the children's assessment rubric showed an average percentage of 67.31%, which was categorized as moderately effective.]]>
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