How it works › What the marks mean

Icons

A list of exercises and categories, each card carrying the icon for its state
Open book
You haven't started this one.
Book
You're working on this — or it was skipped, because you can already do something harder.
Book with check
Done, and done by you: both goals reached, or nailed in one go.
Open folder
A category that is not finished yet.
Folder
A category that is finished — everything in it is done.
Lock
Not yet available — complete the prerequisites first.
Asterisk
Optional — not required to unlock the next step.