The Completion Progress will automatically appear at the bottom of the right-hand block drawer. If you want to configure the bar, press the "Configure" button in the top right corner.

Click "Configure Completion Progress block"

You can change the Block Settings to your liking. Click on the "Question Mark" tool to see what each setting does. 

Click "Show more..." to view more settings.

Optionally, choose "Selected activities" to selectively include activities in the completion progress block. Select activities within the "Select activities" area to display in the block. Multiple selections can be made by holding the 'ctrl' key and clicking or dragging.

By default, all activities with activity completion set up will appear in the block unless "Selected activities" is chosen.

When the required changes have been made, click "Save changes".

The Completion Progress Bar can be seen below.

Completion Progress
NOW
Mouse over or touch bar for info. 
Show all info
Overview of students

Add a Completion Progress block