Abstract
The main features of a professional development program for inservice teachers (ITAM) are described and a
subset of the data from two case studies is presented to highlight some of the strategies used by teachers
while undertaking the program. The case studies demonstrate an isomorphism between the stage of growth
experienced by the teachers in the program and the four problem-solving phases popularised by Polya. These
phases provide a useful framework to analyse the success or failure of inservice experiences and provide some
guidelines for those designing professional development programs. This research also highlights the
usefulness of using our knowledge of student growth in acquiring mathematics concepts to assist in our
understanding of teacher growth.