This study investigates the development of Google Sites-based Indonesian language learning media to improve literacy skills among junior high school students. The research was conducted at UPTD SMP Negeri 3 Parepare using a Research and Development (R&D) approach with the ADDIE model consisting of Analysis, Design, Development, Implementation, and Evaluation. The study involved Grade VIII students, Indonesian language teachers, and expert validators. Data were collected through observation, interviews, questionnaires, validation sheets, and literacy tests. The results indicated that students and teachers required more interactive and technology-based learning resources. The developed Google Sites media was validated by experts and categorized as highly feasible. Practicality testing demonstrated positive responses from both teachers and students. Effectiveness testing revealed significant improvement in students’ literacy achievement, as evidenced by higher post-test scores compared to pre-test scores and a moderate N-Gain category. The findings suggest that Google Sites provides an accessible, interactive, and student-centered learning environment that supports literacy development in Indonesian language learning. Keywords: Google Sites, literacy skills, Indonesian language learning, digital learning media, ADDIE model.

Keywords: Google Sites, Literacy Skills, Indonesian Language Learning, Digital Learning Media, ADDIE Model, Interactive Learning, Student-Centered Learning, Literacy Development.