I recently had a situation in which I was discussing the respiratory system with students and a student may a very racial-laced comment. I just stated that I had never heard that and moved on with my lecture rather than give the student more of the attention. Later, however, another student approached me and said she felt that since I did not make a bigger deal out of it, that it had offended her. How can I effectively deal with this situation without losing the entire day of material?