The lack of uniformity in the concept of Project-Based Learning (PBL) causes confusion. PBL stimulates learning through real-world projects, central questions, collaboration, and support. This method shifts the focus from traditional instruction to active, student-centered learning. This research focuses on the development of Computational Thinking (CT) skills in Vocational High School (VHS) using PBL. This research involved 116 students who were taking Computer Network and Telecommunications Engineering (CNTE) subjects from the competence of Computer and Network Engineering (CNE) expertise. The students collaborated in groups of 2-3 to create a project in the field of Internet of Things (IoT) using sensors and actuators. The project culminated in a final presentation where each group showcased the project design, implementation, and data analysis results. This study analyzes student responses using descriptive statistics and discusses the findings quantitatively and qualitatively. The results highlight the impact of integrating PBL into VHS, especially in improving students’ CT skills. This research emphasizes the need for teamwork, project management, abstraction skills, algorithmic skills, and generalization skills in the context of PBL. Overall, the implementation of PBL not only improves students’ technical and academic abilities but also equips them with project management skills essential for future challenges in both further education and professional careers. © (2025), (UIKTEN - Association for Information Communication Technology Education and Science). All rights reserved.
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