A. diSessa, D. Hammer, B. Sherin & T. Kolpakowski, Journal of Mathematical Behavior, 10, p 117-160 (1991).
Abstract: A cooperative activity involving eight sixth grade students over five days focused on inventing static representations of motion. In generating, critiquing and refining numerous representations, strong metarepresentational competence was found. An intricate blend of the children's conceptual and interactional skills, their interest in and sense of ownership over the inventions, and the teacher's organization of activities were found.
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