Abstract
Research studies have reported upon the difficulties teachers' display in their articulation of
classroom practice and teaching values. Other studies have reported inconsistencies between a
teacher's espoused theory and their theory of action. Argyris and Schon (1974) claimed that
behaviour was driven by individual action theories. This study used a modification of the
Theory of Planned Behaviour (Ajzen, 1988) to uncover the teacher action theories regarding the
use of stencils in primary mathematics classrooms from a selected sample of NSW upper
primary teachers (N = 115). It will discuss these theories and their use in assisting teachers in
their critical reflection and articulation of current practice.