Some Courses are designed to be completed over longer periods of time.
For example, the Cardiovascular Course is designed to be completed over 90 days. This allows you to put the lessons you've completed to practice and really see results.
Check for ongoing lessons
If you're unsure whether your Course is designed this way, check the most recent lesson and read it carefully—especially the end. It will tell you if there is another Lesson coming up in the future.
If you think there is an error with your Lessons or your most recent does not indicate another Lesson is coming please contact Support.