What have you learned in the process of teaching a sensitive topic?

"I was first teaching about dissection a decade ago. When I was bringing up the anatomy of a frog, some students thought they would have some fun with the subject matter. The next year, before we dissected something, we talked first about the maturity of this project and how every student needed to be on their best behavior. If not, they would not be a part of this special occasion. It was safe to say that things were better the second time around."