Learning by Teaching

We tend to think of learning as something that happens to students. This is too bad because thinking in this way sells teaching 11 short of a dozen in terms of what actually happens. Consider the following. You are the student; I'm the instructor, and I set out to teach you that learning is a reciprocal process in which both the student and the environment (including me as the teacher) are changed. How can this be, you wonder, since you expect to learn while I already know the stuff I'm