Abstract
Discussion, theorising and research in the area of mathematical knowledge for teaching began by asking what level of mathematical qualification teachers need. We have moved on considerably since then, using concepts such as pedagogical content knowledge, and frameworks such as those from Deborah Ball in Michigan or, more recently, Tim Rowlands in Cambridge or Alan Schoenfeld in Berkeley.
Some lovely research looking at teachers in action and asking questions about what they bring to their mathematical teaching decisions has pushed our ability to adequately describe the complex environment of the teacher. We are left with the feeling that the practice is still not properly understood.
Anne Watson in Oxford has recently written about "mathematical modes of enquiry"-- mathematical practices that teachers emulate in ways appropriate to the classroom. I will discuss this concept through examples, and propose an extension to it that looks not just at what we know mathematically, nor how we behave mathematically, but also at the way we know: how we hold mathematics.
Bill Barton