This research is a classroom action research that aims to determine the improvement of student learning outcomes through the Asynchronous and Synchronous System (PASS) approach. The research was carried out in two cycles and at the end of the meeting, a final test was carried out. Data were collected utilizing observation, documentation, tests, and questionnaires. Analysis of the impact of the PASS model with the SPSS 20.0 statistical program and the Excel program. Pretest and posttest data were analyzed by pair t-test, N-Gain, and Anova with a significance of 5%. The results showed that the PASS model was effective in improving the learning outcomes of students' problem-solving skills with the average achievement of N-Gain consistent for all learning outcomes indicators and N-Gain in the high category and student responses obtaining a high validity coefficient value and all student responses in the strong category.