Abstract
This paper argues for the need to address children's structural understanding in dealing with mathematical
problems. In support of this argument, a study that investigated children's structural understanding of 2-
D and 3-D combinatorial problems, via a range of thought-revealing tasks, is reported. The results raise
a number of issues for further attention, including the discrepancy between children's accuracy and their
structural understanding, and the lack of significant correlation between children's graphic and symbolic
representations on most of the problems. Individual profiles of response highlight the importance of
rethinking our interpretations of understanding.