<![CDATA[This study aims to develop interactive media, Ruang Urut Seri (RURI), and to examine its feasibility and practicality as a learning medium for ordering numbers 1 to 10 for students with intellectual disabilities. The gap between the Phase C National Curriculum target requiring students to order numbers up to 100, and the actual condition of students who could only order two numbers within the range 1–10, motivated this study. Numbers 1–10 were chosen because mastery of this range is a prerequisite before students can progress to wider number ranges. RURI was developed using Articulate Storyline 3 through the Research and Development (R&D) method applying Borg and Gall’s model modified into seven stages. The media was validated by a media expert and an intellectual disabilities expert, then trialed with one teacher and two students with mild intellectual disabilities at SLB Peduli Anak Bangsa. Validation results yielded an average of 89.55% (Very Valid), comprising media validation 87.5% and content validation 91.6%. The practicality trial achieved an average of 90.93% (Very Practical). RURI is considered feasible and practical for supporting number ordering learning 1–10 among students with intellectual disabilities, though its effectiveness in improving learning outcomes has yet to be examined. Penelitian ini bertujuan mengembangkan media interaktif Ruang Urut Seri (RURI) dan menguji kelayakan serta kepraktisannya sebagai media pembelajaran mengurutkan bilangan 1 sampai dengan 10 bagi peserta didik disabilitas intelektual. Kesenjangan antara capaian pembelajaran Fase C yang menargetkan kemampuan mengurutkan bilangan 1–100 dengan kondisi nyata peserta didik yang baru mampu mengurutkan dua bilangan dalam rentang 1–10 melatarbelakangi penelitian ini. Bilangan 1–10 dipilih karena merupakan kemampuan prasyarat sebelum peserta didik dapat beralih ke rentang bilangan yang lebih luas. RURI dikembangkan menggunakan software Articulate Storyline 3 melalui metode Research and Development (R&D) model Borg and Gall yang dimodifikasi menjadi tujuh tahap. Media divalidasi oleh ahli media dan ahli bidang disabilitas intelektual, serta diujicobakan kepada satu guru dan dua peserta didik disabilitas intelektual ringan di SLB Peduli Anak Bangsa. Hasil validasi mencapai rata-rata 89,55% (Sangat Valid), terdiri dari validasi media 87,5% dan validasi materi 91,6%. Hasil uji coba kepraktisan mencapai rata-rata 90,93% (Sangat Praktis). Media RURI dinilai layak dan praktis digunakan untuk mendukung pembelajaran mengurutkan bilangan 1–10 bagi peserta didik disabilitas intelektual, namun belum menguji efektivitasnya terhadap peningkatan hasil belajar.]]>
