Brilliant does not offer a feature to reset an entire course at once, but you can reset your progress from a specific point onward.
Resetting an individual lesson
To reset an individual lesson:
- On the course page, select the Redo icon or Review button, depending on the course structure.
- Select Reset lesson.
- Confirm the reset.
Redo icon

Review button

Resetting a level (web)
On web, you can also reset progress on a level-by-level basis. Tap a level on the course page and select Reset progress to here. This erases your progress in that level and every level after it in the course — it can't be undone, so use it when you want a genuine do-over from a certain point rather than resetting one lesson at a time.
If you have further questions or need assistance, feel free to contact our support team at support@brilliant.org.