This study examines the influence of social presence, interactions (student-student and teacher-student) and emotional engagement on active learning within the context of social web-based collaborative learning (SWBCL). In order to accomplish this objective, an empirical study was conducted with 416 students from two universities, organized into groups of 4 or 5 students, who were instructed to complete a collaborative project over the course of one semester. At the end of the project, the students filled out a questionnaire and the resulting data was analyzed using the partial least squares (PLS) technique. The results suggest that social presence and teacher-student interaction have a positive influence on students’ active learning, both directly and indirectly, through emotional engagement. This variable also mediates the influence of student-student interactions, which have a less significant impact on active learning than the other analyzed variables. Consequently, this study offers important contributions to the study and practice of active learning in a SWBCL environment.