Why is paper-and-pencil multiplication difficult for many people? (English)
J. Math. Behav. 31, No. 4, 463-475 (2012).
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Block towers: from concrete objects to conceptual imagination. (English)
Maher, Carolyn A. (ed.) et al., Combinatorics and reasoning. Representing, justifying and building isomorphisms. New York, NY: Springer (ISBN 978-0-387-98131-4/hbk; 978-94-007-0614-9/hbk; 978-0-387-98132-1/ebook). Mathematics Education Library 47, 73-86 (2010).
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Modeling perspectives in math education research. (English)
Lesh, Richard (ed.) et al., Modeling students’ mathematical modeling competencies. ICTMA 13. Proceedings of the 13th international conference on the teaching of mathematical modelling and applications, July 22‒26, 2007. London: Springer (ISBN 978-1-4419-0560-4/hbk; 978-1-4419-0561-1/ebook). 61-71 (2010).
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