<![CDATA[The development of integrated Flashcards using Google Sites to improve students' conceptual understanding is aimed at determining the validity of the product, student readability, student responses, and improving students' conceptual understanding. The selected material is the earth and the solar system. The development model uses the ADDIE model (Analyzes, Design, Development, Implementation, Evaluation). The research subjects consisted of individual tests with 3 students, small group tests with 10 students, and large group tests with 24 students. The research instrument was a validation questionnaire from material experts, media experts, and science teachers. The results of the study showed that: (1) the percentage of the media validity test was 98.2% with a very valid category, the material validity test was 100% with a very valid category, (2) the results of the student readability test had an average percentage of 86.11% in the individual test with a very valid category, 86.67% in the small group test with a very valid category, and 84.38% in the large group test with a very valid category, (3) the students' responses to the Google site integrated Flashcard obtained an average of 85.42% in the individual test with a very valid category, 85.83% in the small group test with a very valid category, and 81.51% in the large group test with a very valid category]]>
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