In the portal the section is called Groups. "Stream" and "group" mean the same thing here: a set of people moving through a programme together.
What a stream needs
1A course. A stream always teaches exactly one course, so the course comes first.
2A name. Usually the intake: "Spring", "October evenings".
3Dates. Start and finish. They are optional, but without them the portal cannot say how much of the stream is left, and the gauge on the stream card simply does not appear.
4A teacher. The person who runs it and marks the work. You can assign one later, but a stream without a teacher is called out in the list: it is a job the school has not finished.
A stream is running, finished or archived. A forgotten stream — one whose end date has passed while it is still marked running — stands out in the list straight away, and more often than not that is exactly the loose end.
How students get in
There are two routes, and they do not replace each other.
Enrol directly. If the person is already in your school — a graduate of last year's intake, say — an admin adds them to the new stream without any links at all.
Invite by link. For a new person the portal creates an invitation: a link carrying an address, a role and an expiry date. There is a separate article about that.
One person can study in several streams at once, which is normal when a school runs theory and practice separately.
A student can be removed, in which case the record keeps the date they left — it will be asked about later and cannot be reconstructed afterwards — or finished. Both stay in the Students section: they are still people of this school, just in a different state.
What is allowed
Creating, editing and deleting streams belongs to admins. A teacher sees their own streams and who is in them, but does not decide who studies at the school.
Only an empty stream can be deleted. A stream with students is refused and sent to the archive instead: behind it stand submissions, attempts and possibly issued certificates.
Where a stream leads
Three doors sit on the stream card: the course, the chat and the assignments. They are there so that nobody has to go back to the sidebar and pick the same stream again in another section. The per-student summary opens from a person's name in the list, and it is calculated by the server rather than assembled on screen.