<![CDATA[This study aims to determine the effect of the project-based learning model application on science process skills and students' science learning outcomes. This type of research is a quasi-experimental using a counterbalanced design with a Post-test Only Control Design research, which was carried out in two research sessions. The study population was all students of SMP Negeri 21 Bulubonggu. The sampling technique was purposive. In the first session, the science process skills scores of the experimental class 1 students were 56.40, the experimental class 2 students were 37.95, while the experimental class 1 students' learning outcomes were 70.00, and the experimental class 2's average was 54.50. The results of the independent-sample parametric t-test of science process skills were obtained, p = 0.001, and the learning outcomes obtained were p = 0.000, so that H0 was rejected. The second session of the science process skills scores of the experimental class 1 students obtained an average of 60.60, the experimental class 2 was 72.80, and the learning outcomes of the experimental class 1 students were an average of 62.00, the experimental class 2 was 74, 00. The results of the independent-sample parametric t-test for science process skills were obtained, p = 0.043; the learning outcomes obtained were p = 0.042, so that Ho was rejected. It means that (1) there is an effect of the project-based learning model on students' science process skills, and (2) there is an effect of the project-based learning model on student learning outcomes.]]>
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