Abstract
In this study, we explore the relationship between the learners' visualisations, actions and the environment in which these are articulated. ToonTalk is a visual programming microworld, designed to help students construct mathematical
meanings by linking their actions with multiple representations and with the mediation of programming to build structures and relations. Through a case study of two students interacting with ToonTalk and WebReports, we illustrate a view of
mathematics learning which places at its core the medium of expression, and the building of connections between different modes of representations to discover the related mathematical concepts.
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