<![CDATA[Computational Thinking instruction in Grade VII Informatics at SMPN 8 Bukittinggi remains constrained by limited access to interactive learning media, as classroom activities predominantly rely on textbooks and one-way presentation tools, resulting in suboptimal student engagement. This study aimed to develop interactive multimedia that is valid, practical, and effective in supporting Computational Thinking instruction. The study employed a Research and Development (R&D) approach based on the 4D model, comprising the Define, Design, Develop, and Disseminate stages. The multimedia was developed using Articulate Storyline and published in a web-based HTML5 format. Product validity was evaluated by material and media experts, practicality was assessed through student responses, and effectiveness was measured by comparing pretest and posttest scores using N-Gain analysis. Material validation yielded a score of 95.71%, indicating that the product was highly valid, while media validation after revision also classified it as highly valid. The practicality assessment produced a mean score of 4.52, placing the multimedia in the highly practical category. Students’ mean learning score increased from 61.50 on the pretest to 83.67 on the posttest, with an N-Gain score of 0.58 (58%), representing a moderate improvement. These findings demonstrate that the developed interactive multimedia is valid, practical, and sufficiently effective as a supplementary resource for Grade VII Informatics instruction. The product contributes a more interactive digital learning resource that can facilitate students’ logical and systematic understanding of Computational Thinking concepts.]]>
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