We create a group for each cohort in our courses, so students are enrolled into a group, on a course, with Cohort Sync and the 'Add to Group' function. e.g.
Cohort_Course1_1A goes to Group 1A on Course 1
Cohort_Course1_1B goes to Group 1B on Course 1
Cohort_Course1_1C goes to Group 1C on Course 1
I want to change a user's group from 1A to 1B and keep their group and cohort consistent.
I know that, whilst removing a student from a group causes no loss of grades, removing them from a cohort does.
Can I therefore confirm that adding them to Cohort_Course1_1B and then and only then removing them from Cohort_Course1_1A would also change their cohort without loosing any of their work? Clearly I can't easily test this on live data, and obviously I would only expect this to work if the cohorts were enrolled to the same courses, which they would be.
N.B. Moodle doesn't appear to permit you to move a student between groups where they were added by Cohort Sync, which also complicates matters.