It should be clarified first. Bad is not bad. Bad is good. Bad is hot. Bad is nasty. Bad as in the school board not approving of her dress or her huge boobs or her sexy butt. That's good. Bad girls get all the attention and that's what Nikky is doing here.
Nikky is not really a school teacher except in dirty little male fantasies. Nikky's sex-o-meter is set very high and she likes to rev it.
These photos and Nikky's video are bound to give students massive erections and wet dreams. If that's the price of education, so be it. Even the principal wants in on the action. Who can blame him?