Users who have left the school should not remain permanently in the active school administration.

Options:

When removed from the school, the account is reset to a basic account: neither teacher nor student, no longer assigned to your school. The person's content and login remain, but access to internal school maps is removed.

Warning: Check beforehand whether content, maps, or uploads are still linked to the account. If so, the account cannot be deleted. In that case, simply remove the user from the school.