<![CDATA[This study aims to develop a learning media website based on diagnostic assessments and creative content for school students. The research is motivated by the need for adaptive learning media that assists teachers in mapping students' initial abilities while providing interactive learning content within a single, integrated platform. The study employs the Research and Development (R&D) method using the ADDIE model. The developed website integrates cognitive and non-cognitive diagnostic assessments, learning materials, quizzes, and educational games. Preliminary evaluation was conducted through expert validation and limited trials involving Primary School Teacher Education (PGSD) students as prospective users. Assessment results indicated an average feasibility score of 90.2%, while user trials showed positive initial responses to the assessment features, student ability mapping, and learning content recommendations. The findings suggest that the website has the potential to serve as a supporting medium for differentiated learning. However, further testing—including validation by multiple experts and field trials involving elementary school teachers and students—is required to determine learning effectiveness and the generalizability of the results. Kata kunci: Learning Media; Diagnostik Assessment; Creative Content; Merdeka Curriculum; Website. Abstrak Penelitian ini bertujuan untuk mengembangkan website media pembelajaran berbasis asesmen diagnostik dan konten kreatif untuk siswa Sekolah. Latar belakang penelitian didasarkan pada kebutuhan media pembelajaran adaptif yang dapat membantu guru memetakan kemampuan awal siswa serta menyediakan konten pembelajaran interaktif dalam satu platform terpadu. Penelitian ini menggunakan metode Research and Development (R&D) dengan model ADDIE. Website yang dikembangkan mengintegrasikan asesmen diagnostik kognitif dan non-kognitif, materi, kuis, serta game edukatif. Evaluasi pendahuluan dilakukan melalui penilaian validator dan uji coba terbatas kepada mahasiswa PGSD sebagai calon pengguna. Hasil penilaian menunjukkan rata-rata kelayakan sebesar 90,2%, sedangkan uji coba pengguna menunjukkan respons awal yang positif terhadap fitur asesmen, pemetaan kemampuan siswa, dan rekomendasi konten pembelajaran. Hasil penelitian menunjukkan bahwa website memiliki potensi kelayakan sebagai media pendukung pembelajaran berdiferensiasi. Namun, efektivitas pembelajaran dan generalisasi hasil masih memerlukan pengujian lebih lanjut melalui validasi beberapa ahli serta uji lapangan yang melibatkan guru dan siswa sekolah dasar.]]>
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