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Niss, M. Learning difficulties in mathematics: What are their natureand origin, and what can we do to counteract them?

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Niss, Mogens. Learning Difficulties in Mathematics: What Are Their Natureand Origin, and What Can We Do to Counteract Them?

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Niss, Mogens. Learning Difficulties in Mathematics: What Are Their Natureand Origin, and What Can We Do to Counteract Them?

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