Slavery - is NOT acceptable, is not a casual or common practice and should NOT be engaged in within any context that suggests otherwise or ignores the gross civil and human rights violations. Why couldn't they say "employees" - that's a common, everyday practice (management - employment)
So: what is it that they're really trying to teach, here? That slavery was no big deal?
And the beatings - they're minimizing the seriousness of violence and approaching it with a light-weight attitude and demeanor - what does THAT teach?
I can't believe the teachers received these questions - and gave them to the students to answer them. . . don't teachers pay attention to anything these days?