Home practice

Home practice is what your coach sets between sessions, and ticking it off is how they know it happened.

Steps

Tap Goals and scroll to Home practice. The next few also sit on Home.
Read the task and the detail under it, plus the due date if there is one.
Do it.
Tap Mark done. It moves to Recently completed with today's date.

You cannot untick a task once it is marked done, so only tap it when you have done it.
The streak counts tasks that have been resolved one way or the other. A task set today and due Friday does not break your streak while it is still live.
Your streak also shows on Home as Practice in a row.
A task past its due date is flagged as overdue. Do it anyway and mark it done: your coach would rather have it late than not at all.
A parent linked to you can tick a task off too.