The idea here is to provide core curriculum from a master course and copy that content into new courses, however, any changes to the existing activities in the master course are reflected in the copies with the ability to push out changes to all associated courses.
This feature would streamline getting content to teachers from designers.
The key here is that the activities can be dynamically updated and pushed out by content designers and and copies are updated.
The other key aspect is that the teacher can also add their own content which is not touched or altered by the master activities.