Establishing a custom of proving in american school geometry: evolution of the two-column proof in the early twentieth century

@article{Herbst2002EstablishingAC,
  title={Establishing a custom of proving in american school geometry: evolution of the two-column proof in the early twentieth century},
  author={Patricio G. Herbst},
  journal={Educational Studies in Mathematics},
  year={2002},
  volume={49},
  pages={283-312}
}
  • P. Herbst
  • Published 1 March 2002
  • Education
  • Educational Studies in Mathematics
Having high school students prove geometrical propositions became the norm in the United States with the reforms of the 1890's — when geometry was designated as the place for students to learn the ‘art of demonstration.’ A custom of asking students to produce and write proofs in a ‘two-column format’ of statements and reasons developed as the teaching profession responded to the demands of reform. I provide a historical account for how proving evolved as a task for students in school geometry… 

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