There are other ways that Moodle allows you to develop lessons that feature collaborative learning. For example, you can customize the Forums so that students are required to post, download, and then respond in some way to the fellow student's uploaded file.
For example, a student could be required to post an informational link, such as a link to an article containing statistics on the number of states in the United States that have commercial sorghum farms. Then, another student could convert the statistics into an infographic using a program such as Piktochart.com. The two students could then collaborate and they could put together a three-slide presentation.