...
Blocks can be added to the side of course pages to to display additional information or to include additional features to be used in your course. They are displayed in a ‘drawer’ on the right hand side, that any course participant can expand or collapse.
Blocks can be moved around or deleted.
...
Go to the course page and Turn editing switch on . EDITING MODE
On the left side of your course page, scroll down to Add a block. Click Add… and from thedrop-down select the name of the block you want to add.
...