1. goto Classes -> Schedule in your Control Panel
2. click on 'Add new calendar item' from right rail
3. click 'Create Class'
4. Fill out applicable parameters. Including Start Date. (ignore end date for now)
5. After creating this, go back to the calendar and navigate to when you want this course to end. Click on the class after the last one.
6. A modal will pop up, click 'edit' in top right.
7. The last toggle is 'delete', set this to YES.
8. Select 'Delete this AND ALL future classes.' radio button below
9. Hit 'Edit Calendar item' to confirm.