In the middle of this semester, I decided to do a survey of my students, to see what they had found helpful so far and what I could do to help them get what they wanted out of the rest of the semester. One of the things I discovered from this survey was that the lessons I found most interesting were not necessarily those that the students found most helpful. Two of my three favorite lessons to teach, and two of those that most depend on technology, attracted comments that questioned their utility.