It is possible to add a module to your course that already exists in another course. Click the + button in the top left and select the Copy from Existing button to open the module browser dialog
The Module browser will open for you to search for the module(s) you wish to add.
You can filter from the available options in the tabs, or search by typing into the search field, whereupon Codio will search within all Module names available to you.
You can also order the list of modules by name, created date, student count, or start date of the course by using the dropdown.