To clarify the question, what is the minimum role you can assign as a default for a site that will let the participants add material (and activities) to the site? Do they need to be Course Creator, or is Teacher enough. Or is there a lower role that would still give them rights to add content and activities?

Since Moodle 1.7 allows for extensive role setting I think the question doesnt’ really matter. You can set explicitly what you want each of those roles to mean as well as create your own.

See “”http://kb.ucla.edu/articles/view/in-moodle-what-is-the-difference-between-a-course-creator-and-a-teacher-in-terms-of-permissions">In Moodle what is the difference between a Course Creator and a Teacher in terms of permissions?"