Select the course you want to revise from your home screen.

Then click on "All Awards".  You'll see an overview of how many awards have been received and when the last one was gained.

Hover over each award to see what they are, ones earned will not be greyed out.

Click on "Leader boards" to view.

You'll be able to see where you rank, within your class, in different areas such as score, mastery, attempts etc.