As an administrator or a content manager, you can access from the administration menu an interface that lists the modules, by clicking on "Manage modules" item:
From this interface, you have the possibility to add a new module, to search for a precise module (according to its name), and to sort the list by name or ID:
By clicking on the wheel pictogram on the right side of a module, you can either edit it, duplicate it or delete it. Duplicating a module will create a new module with the same activities inside.
You can also click on "See Results" in order to see all the attempts of users to this module.