颁布单位：[University of the Witwatersrand] |  颁布时间：2009 |  实施时间：2009 |  学科分类：[["Algebra",, "Early, algebra",, "Generalised, arithmetic",, "Transition, from, arithmetic, to, algebra",, "'Symbol, sense'",, "Constructivism",, "Misconceptions",, "Interpretation, of, letters",, "Levels, of, understanding",, "Children's, errors, and, strategies"]]

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