A framework for proofs and refutations in school mathematics: increasing content by deductive guessing. (English)

Educ. Stud. Math. 92, No. 2, 147-162 (2016).

1

Proof problems with diagrams: an opportunity for experiencing proofs and refutations. (English)

Learn. Math. 34, No. 1, 36-42 (2014).

2

Rethinking the discovery function of proof within the context of proofs and refutations. (English)

Int. J. Math. Educ. Sci. Technol. 45, No. 7, 1053-1067 (2014).

3

Invention of new statements for counterexamples. (English)

Liljedahl, Peter (ed.) et al., Proceedings of the 38th conference of the International Group for the Psychology of Mathematics Education “Mathematics education at the edge", PME 38 held jointly with the 36th conference of PME-NA, Vancouver, Canada, July 15‒20, 2014, Vol. 4. [s. l.]: International Group for the Psychology of Mathematics Education (ISBN 978-0-86491-360-9/set; 978-0-86491-364-7/v.4). 17-24 (2014).

4

Potentials for spatial geometry curriculum development with three-dimensional dynamic geometry software in lower secondary mathematics. (English)

Int. J. Technol. Math. Educ. 19, No. 2, 73-79 (2012).

5

Counter-examples for refinement of conjectures and proofs in primary school mathematics. (English)

J. Math. Behav. 29, No. 1, 1-10 (2010).

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