Marking certain blocks as ‘required’ is a feature of Sensei Pro.
Included Blocks
The following blocks can be marked as ‘required’ in a lesson:
- Video (including YouTube, VideoPress, and Vimeo)
- Quiz Questions
- Flashcards
- Image Hotspots
- Tasklists
How To Enable
When editing a lesson, add and configure the block that you want to make required.
Next, click the * button in the toolbar for the block.

That is all that is needed. You will see a small grey circle to the left of the required block. A checkmark will show in the circle once it is interacted with letting the learner know they have completed that requirement.