ABSTRACT This study examines the effects of collaborative augmented reality activities supported by the 5E teaching model on students’ motivation, cognitive load, and satisfaction levels in a science course. In this context, explanatory design, one of the mixed research methods, was used in this study. The research process was conducted with 18 sixth-grade (5 girls and 13 boys) students studying in a private school for four hours a week for four weeks in a science course. In the quantitative dimension of the study, the effects of collaborative augmented reality activities were examined using one group pretest-posttest design through questionnaires and scales, and student views were evaluated through semi-structured interviews as a result. The quantitative data analysis used the Wilcoxon signed-rank test and descriptive statistics methods. Qualitative data were analyzed through the content analysis method. As a result of the study, it was observed that collaborative augmented reality activities positively affected students’ motivation and satisfaction levels in the science learning process. In addition, collaborative augmented reality activities contributed to balancing the cognitive load. In this regard, it can be asserted that students’ learning processes can be made more effective using collaborative augmented reality activities, especially in teaching complex science subjects.