<![CDATA[Interactive digital learning media are essential for supporting effective learning and improving student outcomes. This study aimed to develop a Heyzine-based flipbook learning media for the Facilities and Infrastructure subject in Vocational High Schools (SMK), and to evaluate its validity, practicality, and effectiveness. Utilizing the Research and Development (R&D) method with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation), the study involved eleventh-grade students in the Office Management and Business Services (MPLB) program at SMKS Tirta Sari Surya. Data were analyzed using descriptive percentage analysis for validity and practicality, while Normalized Gain (N-Gain) analysis measured effectiveness via pre-test and post-test scores. The developed flipbook integrates learning materials, instructional videos, QR codes, educational games, summaries, and practice exercises. Expert validation results demonstrated high validity, with scores of 96.88% from the subject matter expert, 97.22% from the media expert, and 96.88% from the instructional design expert. Practicality tests yielded high ratings of 95.08% in one-to-one evaluation and 98.64% in small-group evaluation. Effectiveness testing showed a significant increase in average student scores from 74.38 to 89.50, with an N-Gain score of 0.59 (moderate effectiveness). These findings confirm that the Heyzine-based flipbook is a valid, practical, and effective digital resource for enhancing student learning outcomes. Future research is recommended to evaluate the media across larger samples, broader topics, and different educational levels.]]>
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