In my early years teaching, I was confronted by a graduate student who asked a question which I was not sure of the answer or how to answer it. When asked by my director how I was doing I mentioned the incident to him. He indicated that I should not be doing any research on this but the student should seek out the answer to his question. Later in the class the same student asked a question; I wasn't sure of the answer and suggested to him that he research his question and make a presentation to the class on what he found. I told him where he could research his question, indicated a couple situations in the real world he could look at. The next week he presented and commented to the class that the assignment I gave him was very interesting and rewarding for him. I was gratified, regained my feeling of self-worth, and had a student and class that found the results appropo. This action was "student-centered".