 Hess (2009) and Hess &amp; McAvoy (2014) argue for discussing current controversies and explore some of the ethical dilemmas that arise for teachers who do so. For instance, should a teacher disclose her or his own views or attempt to conceal them to be a neutral moderator? What questions should be presented as genuinely controversial? (Most people would insist that slavery is no longer a controversy and should not be treated as such. But what about the reality of climate change?)