You could be right, but I’m thinking it’s a lesson gone wrong and the teacher doesn’t want to admit it. Surely the “take home” message wasn’t how to give a Nazi salute, but that’s what the kids got out of it. Girl says the emperor, rather the teacher, has no clothes. The teacher tells her to shut up.
The teacher can take her educator’s certificate and wipe her arse with it. What part of being a kid doesn’t she get? Wasn’t she ever one? Is she a Replicant?