Hi Julie,

The "Resume" button always appears next to the unit that you were working on most recently, regardless of whether or not the unit has been completed. This is designed to help you easily continue working from where you previously left off.

If you watch a video or complete a practice exercise in a different unit of the course, the "Resume" button should move to that unit of the course.

I hope this helps! Please let me know if you have any additional questions!