Would you like to reuse some modules or activities from certain courses? Lucky you! "Reusable modules and activities" allows you to simply copy a module or an activity from one course to another. If you need to use the module or activity in several courses, it's also possible to create a module template or activity template and paste it into a course of your choice.
So, how does it work?
Go to the Library and click "Materials" → "Add material" → "Activity Template" or "Module template".
Build the activity or module as you prefer.
To add a reusable activity and module to a project, click on the arrow pointing down next to "New activity", or "New module" and choose whether you wish to import an activity or a module from another course or the library.
To copy an activity or module from one project to another, go to the project you wish to paste the copied activity or module. Click on the arrow pointing down next to "Next activity" or "Next module" and choose “Import activity or module from project”.
You can also read more here.