Notes
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.
Vergnaud, G. (2009). The theory of conceptual fields. Human Development, 52(2), 83–94.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Vergnaud, G. Commentary 1. Educ Stud Math 79, 439–445 (2012). https://doi.org/10.1007/s10649-012-9382-1
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10649-012-9382-1