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Commentary 1

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Notes

  1. A theorem-in-action is a sentence held to be true in action. Most often, it remains implicit (Vergnaud 2009).

References

  • Carpenter, T. P., Moser, J. M., & Romberg, T. A. (1982). Addition and subtraction. A cognitive perspective. Hillsdale: Erlbaum.

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  • Vergnaud, G. (2009). The theory of conceptual fields. Human Development, 52(2), 83–94.

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Correspondence to Gerard Vergnaud.

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Vergnaud, G. Commentary 1. Educ Stud Math 79, 439–445 (2012). https://doi.org/10.1007/s10649-012-9382-1

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