Abstract
This paper describes a set of cognitive research tasks used to assess the understanding of
place value of 21 year 3/4 students. Seven tasks provided enough infonnation about the
conceptual development of the students so that a determination of their progress towards
understanding could be made. Re-administration of the tasks occurred after six months and
then twelve months. The results supported the ability of defined levels of response to the
tasks to describe a developmental pathway. Mediation of the tasks during administration
identified some validity and interpretation issues. The study confirmed that students of this
age are grappling with the development of an understanding of place value and therefore are
in need of explicit teaching in this domain.
Jeanette Bennan