Although Schon's reflection-in-action and reflection-on-action have been im
portant advances in understanding teaching, they do not capture important,
tacit dimensions of the experience of teaching and being-in-the-classroom.
These tacit dimensions of teaching cannot be acquired through didactic meth
ods, but have to be enacted in lived experience. Teacher development can th
erefore be viewed as a becoming-in-the-classroom. In this paper, we show ho
w coteaching provides a context in which novice teachers can come to embody
this dimension of teaching which is essential to mastery. (C) 1999 Elsevie
r Science Ltd. All rights reserved.