The rapid development of digital technology demands adequate computational cognitive abilities, particularly in Informatics subjects at the high school level. However, there is a gap between these demands and students' still-low computational thinking skills. This research aims to develop an effective learning medium to enhance high school students' computational cognitive abilities in Informatics. The research method involved developing virtual reality media using the Millealab platform, accessible via Android devices. The feasibility, practicality, and effectiveness of the media were tested through validation by a media expert (Millealab) and a material expert (Informatics teacher at SMAN 1 Cigombong), as well as trials with teachers. The media expert's validation results showed an average score of 4.44 (very feasible), while the material expert obtained an average score of 3.57 (feasible). Practicality testing by users (teachers and students) achieved an average score of 90.97% (very practical). Effectiveness testing with pretest and posttest demonstrated a significant increase in students' cognitive scores. This research indicates that the developed virtual reality media is highly feasible, very practical, effective, and significant in enhancing students' computational cognitive abilities, especially in the computational thinking element within Informatics subjects. The comprehensive development of this virtual reality-based Informatics learning medium can be an innovative solution to address the gap in students' computational thinking skills, provide an immersive learning experience, and positively contribute to the quality of learning.
