The low reading skills and ability to use commas in elementary school students indicate that conventional methods still dominate the learning process and have not utilized contextual learning media. This condition contributes to low student engagement and less-than-optimal learning outcomes in the Indonesian language among grade II students. This study aims to analyze, evaluate, and test the validity, practicality, and effectiveness of flashcard media containing Tat Twam Asi values in improving students' reading skills. This study is a Research and Development (R&D) study with the ADDIE development model. The research subjects consisted of grade II elementary school students, while the validity test subjects involved material experts and learning media experts. Data collection methods included observation, interviews, questionnaires, documentation, and learning outcome tests, with instruments such as expert validation sheets, teacher and student response questionnaires, and pretest-posttest tests. Data analysis was carried out descriptively and quantitatively using percentages, Aiken's V validity tests, correlated t-tests, and N-Gain Scores. The results showed that the developed flashcard media met the criteria of validity, practicality, and effectiveness, and improved students' reading skills more effectively. The study's conclusions indicate that flashcards containing Tat Twam Asi are effective in improving elementary school students' reading skills in a more contextual and meaningful way. The implications of this study emphasize the importance of integrating local wisdom into the development of learning media to strengthen students' literacy and character.
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