Abstract
The notion of proof is arguably a fundamental concept in mathematics. Mathematics curricula expect students to develop understanding of proof through explaining and justifying their mathematical responses, and communicating these responses in coherent ways. This study reports the findings from a sample of students in Years 5 and 6 in two schools to a question that asked them to prove a mathematical statement of equality. Survey results from 56 students, and twelve follow-up interviews, were analysed using the SOLO model. Implications from the findings that most students could not use a zero statement to justify their responses, and that answers appeared to be related to language-based factors will be discussed.