Abstract
Research into individual thinking about algebra faces a
significant problem in the tacit nature of knowledge in this
domain. This paper documents a research design which
incorporated Repertory Grid principles within an image-based
research model. Finely detailed study of perceptions of algebraic
images offered a powerful complement to the more usual verbal
approaches, providing insights into both student thinking about
key concepts in algebra, and into the network of relations within
which such concepts exist for individuals learning algebra .