<![CDATA[This study aims to determine the effect of student understanding and student activity on learning outcomes in informatics subjects through the mediator of project completion ability. The study used a quantitative approach with the Structural Equation Modelling analysis method with 168 students as respondents. The data collection instrument was a questionnaire containing positive and negative statements covering indicators including, understanding (translation, interpretation, extrapolation), activity (participation, gathering information, discussion, assessing self-ability), learning outcomes (cognitive, affective, psychomotor improvements), project completion skills (problem solving, critical thinking, project management). The results showed that student understanding had a significant effect on learning outcomes (percentage 25.2%, p-value 0.001), and project completion skills (percentage 32.7%, p-value 0.000). Student activity does not affect learning outcomes (percentage of 2%, p-value 0.802), but affects the skills to complete projects (percentage 50.5%, p-value 0.000). The skills to complete projects have a significant effect on learning outcomes (percentage 57.7%, p-value 0.000). In addition, student understanding and student activity have a significant indirect effect on learning outcomes through the mediator of project completion skills with each percentage (18.9%, p-value 0.000 and 29.2%, p-value 0.000). Thus, student understanding and project completion skills have a direct effect on student learning outcomes, while student activity only has an indirect effect through project completion skills.]]>
