The question of how far teacher images are resilient to change and how
far influenced by context is discussed. The images of two preservice
teachers over a I-year training course are presented to illustrate dif
ferent types of difficulty involved in image and learning to teach. In
one case an ambiguity over image leads to excessive conformity to the
norms of the school; in another, a clear articulation of image presen
ts the danger of the image being shattered by powerful contextual fact
ors. Such different difficulties may be resolved by the conceptualisat
ion of image as a form of argument.