Collaborative learning has a long tradition within higher education. However, its application in classes with a large number of students is complicated, since it is a teaching method that requires a high level of participation from the students and careful monitoring of the process by the educator. This article presents an experience in collaborative learning adapted to large class sizes using wikis. The objective is to check if wikis allow for effective collaborative learning methods to be introduced into large groups. The results show how effective wikis can be in encouraging collaborative learning and active participation by the student, as well as facilitating the monitoring and assessment of individual work even in large classes.