Abstract
This paper reports on aspects of a study which investigated the writing of explanations and
justifications in mathematics with Year 11 students. Six teachers and 36 students from the
same school responded to problem solving tasks; 14 of these students were interviewed.
Student and teacher views about the writing process are reported. The study suggests that
students and teachers need to jointly negotiate an understanding of what is meant by an
explanation, a justification, and what makes a quality response.