Abstract
As part of the moves to reform mathematics teaching in New South Wales, the Years 7-10 Mathematics Syllabus emphasises working mathematically. This paper presents the results of interviews conducted with 39 teachers to examine how they interpret the aims of working mathematically and the extent to which they are implementing working mathematically in their classrooms. The results indicate that while a small number of teachers have embraced the reforms, most have a limited conception of what working mathematically means and have not made any substantial change in their practice. The possible reasons for this situation are discussed.