The low literacy, numeracy, and Higher Order Thinking Skills (HOTS) achievement of elementary school students indicates that the ongoing learning has not been fully able to facilitate diverse learning needs and is still dominated by procedural activities. This study produced a Google Sites-based digital learning media enriched with the Remedial on Click feature as an adaptive learning tool to strengthen these three competencies. Product development used a Research and Development (R&D) approach through the 4D model, while effectiveness testing was conducted using a quasi-experimental design involving treatment and comparison classes. Research data were obtained through pre-tests and post-tests, observations, and student response questionnaires, then processed using N-Gain analysis and independent sample t-test. The evaluation results showed that the media met the criteria of being very valid and very practical for use in learning. The increase in student abilities was in the medium to high category with an N-Gain value of 0.63, while statistical analysis confirmed that the class utilizing the media achieved better learning outcomes than the conventional class (p<0.05). These findings indicate that the integration of Google Sites with the Remedial on Click feature supports adaptive learning, strengthens literacy, numeracy, and HOTS, and is a relevant digital media alternative for differentiated learning in elementary schools.
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