Once you've chosen or created a resource, you'll be able to find it in your 'discover' tab.
From here, you can add it to a particular class. Simply click on the lesson menu at the right hand side, and select 'add to class'.
You can then select which class you want to assign it to from your dropdown menu.
Next, go to the 'my classes' tab, where you can click the share symbol.
This generates a code that you can copy, paste and send to your students. They'll get a link to the lesson you'd like them to complete. It's that simple!