I recently made a couple of small changes to the Course Outline page.
The “Complete” links have been renamed as “Transcript” and have moved to the front of every lesson. I feel “Transcript” is a more descriptive label than “Complete” and moving it to the front better reflects the progression that most users make with the lessons: Start with the lesson, while following along with the transcript, then move to the Vocabulary page, followed by the Activity and other pages that follow.
Hope that makes sense and doesn’t cause too much disruption in your lesson navigation.