The practice ended in a link
You generated a practice for a student, and the last step was copying a link and carrying it somewhere else: WhatsApp, an email of your own, the forum. There it competed with everything else in the thread. You could not tell whether it had arrived, and your student had no signal that anything was waiting for her.
That changed. You now share from inside.
It is on the card you already use
In your practices section, every practice you generated has a share button, next to Start.

You pick, one by one
A list of your students opens: the ones in your started courses, with the course next to each name so you know who is who. Tick the ones you want.
If a course is a group course, it appears bracketed and you select the whole thing with one click. You can add a message: what this practice is for, what you want them to look at, when you expect it.
We do not filter by level or by language. You know who it helps.

Your student finds out, and the practice waits
Everyone you picked gets an in-app notification and an email, with your name and your message. And the practice appears in her section from that moment, with a label saying who it came from. It does not depend on her opening a link.

Group courses also get the forum
If you share with every student in a group course, you can post it in the course forum too. It stays as course material, not only in each inbox. In a one-to-one course the option does not appear: it would post to a forum for the one person who already got the notification and the email.
You can share again
If you already shared a practice with someone, you will see them marked in the list, unticked. Pick them again and they hear about it again. Sometimes a reminder is exactly what is needed.
Where to start
Go to Practices, open one you generated and tap Share.