Development of Interactive Learning Media for Informatics Subjects in Junior High Schools

Abstract

This study addresses the absence of interactive learning media for the Informatics subject at a junior secondary school in Indonesia, where instruction has relied on printed materials and one-way digital slides. Employing a Research and Development approach guided by the ten-stage instructional design model of Dick, Carey, and Carey, the study developed and validated an interactive learning medium for seventh-grade Informatics using the Lumi Education application, focusing on the Algorithms and Programming content area. The product was evaluated through expert judgment by a subject-matter expert, an instructional-design expert, and a media expert, followed by staged student trials involving one-to-one, small-group, and field-trial evaluations totaling thirty-nine seventh-grade students. Data were collected through Likert-scale questionnaires and analyzed descriptively by converting raw scores into percentages classified against a qualitative interpretation scale. Expert validation yielded percentages ranging from 85.21% to 89.46%, categorized as "Good" to "Excellent," while student evaluations ranged from 85.46% to 91.68%, with the small-group stage showing an unexpected dip relative to the one-to-one and field-trial stages. Qualitative feedback led to revisions of the exercise layout and the addition of a user-guide menu. These findings indicate that the developed interactive medium is valid and feasible for classroom implementation, offering teachers a ready-to-use resource that reduces reliance on one-way instruction and strengthens students' digital literacy and computational thinking within the Kurikulum Merdeka framework, while highlighting instructional-design scaffolding as an area warranting further refinement.