Abstract
A large study tracked four primary teachers during their ftrst year of teaching, with a focus on how a 'fellow worker' professional development support model influenced their pedagogical. practices and beliefs concerning mathematics. The case studies used an interpretive research approach for analysis of data from interviews, observations, reflective journals, and group meetings. The fmdings highlight how the realities and challenges of beginning teachers' classroom experiences prompted adoption of 'traditional', teachercentred mathematics pedagogy. Support in the form of a 'fellow worker' helped the beginning teachers survive and then begin to teach in ways consistent with current trends in mathematics education.