Mine or ours?

One person from the class apologized to me for bringing up a subject in the class that we didn't take time to pursue. He then added that he shouldn't do that as it wasn't his class, it was my class. I may be the teacher but it is just as much his class as it is mine. There are some topics that we do not follow as they are not relevant to the study of the day but he still has a right to bring them up. Without people like him there would be not class.