Abstract
This is a report on part of a larger study about teacher assessment practice in New Zealand.
The interviews with teachers of Year 3 and 6 students are analysed. These interviews indicate
that teachers are using a variety of assessment strategies for a mastery-based system of
assessment. The judgement of students' mathematical performance appears to be dominated by
the belief that all students must feel that they are achieving. It is conjectured that a system
effect determines teachers' assessment in the school environment.