Scenario: Students from class 12A are divided into two subgroups (s1 and s2) for Computer Science. The same teacher, John Smith, teaches both groups — but in separate sessions.

Step 1 — Create the division

Go to Classes → 12A → Subgroups → Add division.

Field	Value
Division name	Computer Science
Subgroups	s1, s2

Save.

Step 2 — Add the lessons

Go to Lessons → Quick Add and add one lesson per subgroup:

Teacher	Subject	Groups	Lessons/week
John Smith	Computer Science	12A-s1	2
John Smith	Computer Science	12A-s2	2

Result in the timetable

Because the same teacher teaches both subgroups, the two lessons clearly cannot run in parallel. The scheduler will place them at the beginning or end of the day so that neither subgroup ends up with a gap in the middle of their schedule.

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