A feedback slip at a recent faculty teaching workshop I ran asked the title question of me personally. Some thoughts:
1. A colleague who shifted during graduate school from ecology to science education studied science faculty who made a big change in their teaching (towards being more interactive, activity-based, etc.). He concluded, as I recall it, that each person had their own biographical reasons–there were no generalizations.
2. I have often found myself saying that I haven’t systematically looked at my own development as a teacher. I don’t have a coherent narrative to offer anyone else.
3. It is the case that I have tried to articulate my guiding themes ever since I had to prepare material for reappointment/promotion reviews. Doing this made me, in turn, more conscious of what I was doing (see http://www.faculty.umb.edu/pjt/portfolio05.html and precursors).
4. But being reviewed may not be the explanation — indeed, colleagues advised me to focus on publications because teaching doesn’t really count. At about the same time, I had stumbled into being the advisor for graduate students teaching writing-intensive seminars (because I had started such teaching for extra $$ one summer). In that role, I observed their classes and had to invent ways of reflecting back what I saw — some of my themes about teaching arose from doing that. From that experience I convened a “teaching co-op,” in which faculty and grad. students observed each other’s classes.
5. But commenting on the teaching of colleagues may not be the explanation, given that I had already instituted a practice some years earlier of having students take turns to stay after class and give feedback.
…and so on.
6. I think a key connecting strand here is that my research has always been about problematic boundaries of complex situations and I have sought and made use of opportunities to teach interdisciplinary courses about life and environmental sciences in their social contexts. This teaching gave me the chance — or made it a necessity — to formulate my own distinctive interdisciplinary themes. In short, reflection on my teaching practice was less some virtuous approach to teaching and more something I had to do intellectually.
(More thinking, remembering, reflecting is needed here…)