Teachers in primary schools often talk about children 'becoming readers' or 'being writers' but rarely do they speak of children 'becoming' or 'being' mathematicians. The discourse is more often around children needing to learn mathematics, a discourse that, significantly, maintains a view of the learner and mathematics as occupying separate spaces: the mathematics to be learnt is 'out there' and it is the job of the teacher to help the learner 'acquire'...