i'm sure you have already considered this but, i think another vitally important element to consider with the blackboard art contrasting derogitory words for indigeneous people is, not only that it connotes an educational environment, but also that it can be erased so easily, or even that people write on a blackboard with the intention of erasing it. so that is a bit of a parallel to the stolen generation of aboriginal children whose entire identities were erased with the systematic disposal of records and the cultural bleaching which ensued therein.
the ability for a government, or any ruling body to systematically erase or devalue the experience of a group of oppressed people is what is at stake through education whether it be actual school, or media control, or general cultural dictation.
i hope that helps somehow.
that work sounds incredible. i wish i could have seen it.
debbie