<![CDATA[Vocational education in Indonesia faces challenges in providing interactive learning that aligns with the demands of Industry 4.0. In addition, students’ low engagement in understanding technical concepts remains a major obstacle to achieving meaningful learning outcomes. This study aims to evaluate the effectiveness of a web-based learning system using the PACTA model in improving student learning outcomes. The research employed a quasi-experimental method with a pre-test and post-test design across two groups: one group used the PACTA system integrated with Augmented Reality (AR) and an AI-based chatbot, while the other group used a conventional web-based learning platform. Results showed that the PACTA group experienced an increase in average score from 45.22 to 63.91 (t = 3.508; p = 0.002) with an effect size of 18.69%, while the conventional group improved from 38.04 to 44.79 (t = 2.273; p = 0.031) with an effect size of 6.75%. Student perception data showed high satisfaction, with effectiveness at 90.67%, ease of use at 88.2%, and accessibility at 85.0%. The findings conclude that the PACTA-based learning system effectively enhances student engagement and understanding and is recommended for broader application in vocational education.  ]]>
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