One of my lessons just stays queued. How do I fix this?

To fix a queued lesson, uninstall the lesson then re-install it following these steps:

1. Open your Playground Sessions app and log in
2. At the top of your screen, click on Edit > Manage My Lessons
3. On the new screen, find this lesson, click on it, then click on “Uninstall Lesson”
4. Close and then reopen your app
5. Download this lesson again